Eclipse/GGTS IDE Integration

Submitted PR for issue #109.
So you mean I can access a value. I just recalled, while I facing issue for <code>groovyVersion</code> value, you have suggested to use <code>project.afterEvaluate</code> [here](https://github.com/grails/grails-gradle-plugin/issues/109#issuecomment-48045557)

Will give a try!