Giter8 template not working on non-default sbt version

When you run `g8 foundweekends/giter8.g8` it gives you the option to set the sbt_version. The default version number is 0.13.16-M1 (which seems questionable to me since it's a pre-release). When you run `sbt` on the top-level project generated by the g8 command, it works just fine. When you change the version of sbt to something else (the two I tested were 0.13.15 and 0.13.13) during the configuration step in the `g8` command and then try to run `sbt` again, there is an incompatible plugins exception:
```
Project loading failed: (r)etry, (q)uit, (l)ast, or (i)gnore? last
[info] Loading project definition from /path_to/testing/project
[debug] [naha]
[debug] [naha] Initial source changes:
[debug] [naha] removed:Set()
[debug] [naha] added: Set()
[debug] [naha] modified: Set()
[debug] [naha] Invalidated products: Set()
[debug] [naha] External API changes: API Changes: Set()
[debug] [naha] Modified binary dependencies: Set()
[debug] [naha] Initial directly invalidated sources: Set()
[debug] [naha]
[debug] [naha] Sources indirectly invalidated by:
[debug] [naha] product: Set()
[debug] [naha] binary dep: Set()
[debug] [naha] external source: Set()
[debug] All initially invalidated sources: Set()
[debug] Copy resource mappings:
[debug]
[debug] Forcing garbage collection...
sbt.IncompatiblePluginsException: Binary incompatibility in plugins detected.
Note that conflicts were resolved for some dependencies:
org.codehaus.plexus:plexus-utils
org.scala-sbt:sbt
at sbt.PluginDiscovery$.incompatiblePlugins(PluginDiscovery.scala:145)
at sbt.PluginDiscovery$.loadModules(PluginDiscovery.scala:135)
at sbt.PluginDiscovery$.binarySourceModules(PluginDiscovery.scala:124)
at sbt.PluginDiscovery$.discover$1(PluginDiscovery.scala:28)
at sbt.PluginDiscovery$.discoverAll(PluginDiscovery.scala:43)
at sbt.Load$.loadPlugins(Load.scala:900)
at sbt.Load$.loadPluginDefinition(Load.scala:857)
at sbt.Load$.buildPlugins(Load.scala:852)
at sbt.Load$.plugins(Load.scala:840)
at sbt.Load$$anonfun$loadUnit$1$$anonfun$34.apply(Load.scala:465)
at sbt.Load$$anonfun$loadUnit$1$$anonfun$34.apply(Load.scala:465)
at sbt.Load$.timed(Load.scala:1025)
at sbt.Load$$anonfun$loadUnit$1.apply(Load.scala:464)
at sbt.Load$$anonfun$loadUnit$1.apply(Load.scala:459)
at sbt.Load$.timed(Load.scala:1025)
at sbt.Load$.loadUnit(Load.scala:459)
at sbt.Load$$anonfun$25$$anonfun$apply$14.apply(Load.scala:311)
at sbt.Load$$anonfun$25$$anonfun$apply$14.apply(Load.scala:310)
at sbt.BuildLoader$$anonfun$componentLoader$1$$anonfun$apply$4$$anonfun$apply$5$$anonfun$apply$6.apply(BuildLoader.scala:91)
at sbt.BuildLoader$$anonfun$componentLoader$1$$anonfun$apply$4$$anonfun$apply$5$$anonfun$apply$6.apply(BuildLoader.scala:90)
at sbt.BuildLoader.apply(BuildLoader.scala:140)
at sbt.Load$.loadAll(Load.scala:365)
at sbt.Load$.loadURI(Load.scala:320)
at sbt.Load$.load(Load.scala:316)
at sbt.Load$.load(Load.scala:305)
at sbt.Load$$anonfun$4.apply(Load.scala:146)
at sbt.Load$$anonfun$4.apply(Load.scala:146)
at sbt.Load$.timed(Load.scala:1025)
at sbt.Load$.apply(Load.scala:146)
at sbt.Load$.defaultLoad(Load.scala:39)
at sbt.BuiltinCommands$.liftedTree1$1(Main.scala:548)
at sbt.BuiltinCommands$.doLoadProject(Main.scala:548)
at sbt.BuiltinCommands$$anonfun$loadProjectImpl$2.apply(Main.scala:540)
at sbt.BuiltinCommands$$anonfun$loadProjectImpl$2.apply(Main.scala:540)
at sbt.Command$$anonfun$applyEffect$1$$anonfun$apply$2.apply(Command.scala:59)
at sbt.Command$$anonfun$applyEffect$1$$anonfun$apply$2.apply(Command.scala:59)
at sbt.Command$$anonfun$applyEffect$2$$anonfun$apply$3.apply(Command.scala:61)
at sbt.Command$$anonfun$applyEffect$2$$anonfun$apply$3.apply(Command.scala:61)
at sbt.Command$.process(Command.scala:93)
at sbt.MainLoop$$anonfun$1$$anonfun$apply$1.apply(MainLoop.scala:96)
at sbt.MainLoop$$anonfun$1$$anonfun$apply$1.apply(MainLoop.scala:96)
at sbt.State$$anon$1.doX$1(State.scala:183)
at sbt.State$$anon$1.process(State.scala:190)
at sbt.MainLoop$$anonfun$1.apply(MainLoop.scala:96)
at sbt.MainLoop$$anonfun$1.apply(MainLoop.scala:96)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.MainLoop$.next(MainLoop.scala:96)
at sbt.MainLoop$.run(MainLoop.scala:89)
at sbt.MainLoop$$anonfun$runWithNewLog$1.apply(MainLoop.scala:68)
at sbt.MainLoop$$anonfun$runWithNewLog$1.apply(MainLoop.scala:63)
at sbt.Using.apply(Using.scala:24)
at sbt.MainLoop$.runWithNewLog(MainLoop.scala:63)
at sbt.MainLoop$.runAndClearLast(MainLoop.scala:46)
at sbt.MainLoop$.runLoggedLoop(MainLoop.scala:30)
at sbt.MainLoop$.runLogged(MainLoop.scala:22)
at sbt.StandardMain$.runManaged(Main.scala:109)
at sbt.xMain.run(Main.scala:38)
at xsbt.boot.Launch$$anonfun$run$1.apply(Launch.scala:109)
at xsbt.boot.Launch$.withContextLoader(Launch.scala:128)
at xsbt.boot.Launch$.run(Launch.scala:109)
at xsbt.boot.Launch$$anonfun$apply$1.apply(Launch.scala:35)
at xsbt.boot.Launch$.launch(Launch.scala:117)
at xsbt.boot.Launch$.apply(Launch.scala:18)
at xsbt.boot.Boot$.runImpl(Boot.scala:41)
at xsbt.boot.Boot$.main(Boot.scala:17)
at xsbt.boot.Boot.main(Boot.scala)
Caused by: java.lang.NoSuchMethodError: sbt.Keys$.pluginCrossBuild()Lsbt/TaskKey;
at sbt.ScriptedPlugin$.(ScriptedPlugin.scala:101)
at sbt.ScriptedPlugin$.(ScriptedPlugin.scala)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at sbt.ModuleUtilities$.getObject(ModuleUtilities.scala:14)
at sbt.ModuleUtilities$.getCheckedObject(ModuleUtilities.scala:20)
at sbt.ModuleUtilities$$anonfun$getCheckedObjects$1.apply(ModuleUtilities.scala:23)
at sbt.ModuleUtilities$$anonfun$getCheckedObjects$1.apply(ModuleUtilities.scala:23)
at scala.collection.immutable.Stream.map(Stream.scala:376)
at sbt.ModuleUtilities$.getCheckedObjects(ModuleUtilities.scala:23)
at sbt.PluginDiscovery$.loadModules(PluginDiscovery.scala:130)
at sbt.PluginDiscovery$.binarySourceModules(PluginDiscovery.scala:124)
at sbt.PluginDiscovery$.discover$1(PluginDiscovery.scala:28)
at sbt.PluginDiscovery$.discoverAll(PluginDiscovery.scala:43)
at sbt.Load$.loadPlugins(Load.scala:900)
at sbt.Load$.loadPluginDefinition(Load.scala:857)
at sbt.Load$.buildPlugins(Load.scala:852)
at sbt.Load$.plugins(Load.scala:840)
at sbt.Load$$anonfun$loadUnit$1$$anonfun$34.apply(Load.scala:465)
at sbt.Load$$anonfun$loadUnit$1$$anonfun$34.apply(Load.scala:465)
at sbt.Load$.timed(Load.scala:1025)
at sbt.Load$$anonfun$loadUnit$1.apply(Load.scala:464)
at sbt.Load$$anonfun$loadUnit$1.apply(Load.scala:459)
at sbt.Load$.timed(Load.scala:1025)
at sbt.Load$.loadUnit(Load.scala:459)
at sbt.Load$$anonfun$25$$anonfun$apply$14.apply(Load.scala:311)
at sbt.Load$$anonfun$25$$anonfun$apply$14.apply(Load.scala:310)
at sbt.BuildLoader$$anonfun$componentLoader$1$$anonfun$apply$4$$anonfun$apply$5$$anonfun$apply$6.apply(BuildLoader.scala:91)
at sbt.BuildLoader$$anonfun$componentLoader$1$$anonfun$apply$4$$anonfun$apply$5$$anonfun$apply$6.apply(BuildLoader.scala:90)
at sbt.BuildLoader.apply(BuildLoader.scala:140)
at sbt.Load$.loadAll(Load.scala:365)
at sbt.Load$.loadURI(Load.scala:320)
at sbt.Load$.load(Load.scala:316)
at sbt.Load$.load(Load.scala:305)
at sbt.Load$$anonfun$4.apply(Load.scala:146)
at sbt.Load$$anonfun$4.apply(Load.scala:146)
at sbt.Load$.timed(Load.scala:1025)
at sbt.Load$.apply(Load.scala:146)
at sbt.Load$.defaultLoad(Load.scala:39)
at sbt.BuiltinCommands$.liftedTree1$1(Main.scala:548)
at sbt.BuiltinCommands$.doLoadProject(Main.scala:548)
at sbt.BuiltinCommands$$anonfun$loadProjectImpl$2.apply(Main.scala:540)
at sbt.BuiltinCommands$$anonfun$loadProjectImpl$2.apply(Main.scala:540)
at sbt.Command$$anonfun$applyEffect$1$$anonfun$apply$2.apply(Command.scala:59)
at sbt.Command$$anonfun$applyEffect$1$$anonfun$apply$2.apply(Command.scala:59)
at sbt.Command$$anonfun$applyEffect$2$$anonfun$apply$3.apply(Command.scala:61)
at sbt.Command$$anonfun$applyEffect$2$$anonfun$apply$3.apply(Command.scala:61)
at sbt.Command$.process(Command.scala:93)
at sbt.MainLoop$$anonfun$1$$anonfun$apply$1.apply(MainLoop.scala:96)
at sbt.MainLoop$$anonfun$1$$anonfun$apply$1.apply(MainLoop.scala:96)
at sbt.State$$anon$1.doX$1(State.scala:183)
at sbt.State$$anon$1.process(State.scala:190)
at sbt.MainLoop$$anonfun$1.apply(MainLoop.scala:96)
at sbt.MainLoop$$anonfun$1.apply(MainLoop.scala:96)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.MainLoop$.next(MainLoop.scala:96)
at sbt.MainLoop$.run(MainLoop.scala:89)
at sbt.MainLoop$$anonfun$runWithNewLog$1.apply(MainLoop.scala:68)
at sbt.MainLoop$$anonfun$runWithNewLog$1.apply(MainLoop.scala:63)
at sbt.Using.apply(Using.scala:24)
at sbt.MainLoop$.runWithNewLog(MainLoop.scala:63)
at sbt.MainLoop$.runAndClearLast(MainLoop.scala:46)
at sbt.MainLoop$.runLoggedLoop(MainLoop.scala:30)
at sbt.MainLoop$.runLogged(MainLoop.scala:22)
at sbt.StandardMain$.runManaged(Main.scala:109)
at sbt.xMain.run(Main.scala:38)
at xsbt.boot.Launch$$anonfun$run$1.apply(Launch.scala:109)
at xsbt.boot.Launch$.withContextLoader(Launch.scala:128)
at xsbt.boot.Launch$.run(Launch.scala:109)
at xsbt.boot.Launch$$anonfun$apply$1.apply(Launch.scala:35)
at xsbt.boot.Launch$.launch(Launch.scala:117)
at xsbt.boot.Launch$.apply(Launch.scala:18)
at xsbt.boot.Boot$.runImpl(Boot.scala:41)
at xsbt.boot.Boot$.main(Boot.scala:17)
at xsbt.boot.Boot.main(Boot.scala)
[error] sbt.IncompatiblePluginsException: Binary incompatibility in plugins detected.
[error] Note that conflicts were resolved for some dependencies:
[error] org.codehaus.plexus:plexus-utils
[error] org.scala-sbt:sbt
[error] Use 'last' for the full log.
[debug] > load-failed
[debug] > last
```
If you go to the template within the project and run `sbt`, it works just fine.

If you change the `build.properties` file in /path_to/testing/project to be 0.13.16-M1, but leave the one in the template as whatever you want (ex. 0.13.15), it works just fine. To me, it means that either the configuration process when running `g8` is mistakenly also changing the version of sbt being used in the project or you have a dependency (the plexus-utils one presumably) that is tied to a particular version of sbt as opposed to changing depending on what's asked for in the configuration process.

Reproduce the issue with `g8 foundweekends/giter8.g8`, selecting sbt 0.13.15 or 0.13.13, then compare `build.properties` in the generated `/path_to/testing/project` and the template. Check why the generated top-level project fails while the template works; done means the generated project loads successfully with the selected sbt version without an incompatible plugins exception.

Written by the indexing model from the issue text.