Groovy support

[engrun]

Hi. Thanks for a great plugin, appreciate the initiative.
And obviously I didn't read the docs well enough from the start as it being annotation based, I though it would work for all jvm based languages.

When running a test on both a groovy and a java application, I discovered that the plugin won't report on groovy code. Works great with java.

Are there any plans on supporting Groovy as well?
Hopefully it is very easy to extend the plugin to other jvm languages.