ImageJ fails to run ImageJ1 plugins when launched from Eclipse

In Eclipse, edit `net.imagej.Main.main` to add the line:

``` java
System.setProperty("plugins.dir", "/path/to/your/Fiji.app");
```

Then launch the main class. You will see all of Fiji's plugins in the menus. However, attempting to execute any of them yields a dialog box with a "Plugin or class not found" error.

[Reported on the imagej-devel mailing list by Christian Göschl](http://imagej.net/pipermail/imagej-devel/2015-January/002415.html).

Reproduce the failure by launching net.imagej.Main.main from Eclipse with plugins.dir set to a Fiji.app path, then inspect the plugin-loading path associated with the "Plugin or class not found" dialog. Done means ImageJ1 plugins discovered in the menus can be executed successfully from Eclipse.

Written by the indexing model from the issue text.