Minecraft version integrity

While thinking about blocks, items and entitys i came to the conclusion that we may want to support multiple minecraft versions.

I thought that it would make sanity checks easier when we add an Annotation like `MinecraftVersion` to blocks, items and such. This annotation would contain the release version of the Type.

In the light of the recent changes about names instead of IDs I also would like you to take a look at the Minecraft 1.11 [changelog](http://minecraft.gamepedia.com/1.11). There are changes listed for blocknames. E.g. `Cauldron `got changed to `brewing_stand`. Any ideas how to keep compatibility or do you think it will be easier to just release multiple minecraft.client libs for different server versions? This might make a MinecraftVersion annotation obsolete.