Merge pull request #28 from kpartlow/master

UrlClassLoader changes
- updated Groovy version used by n-cube
- Added test that illustrates dynamically loaded groovy code is single-step debug-able.
- Added test that illustrates externally referenced Groovy code is dynamically pulled in by Groovy via URLs added to Groovy's class loader
Updated with url speed up changes
remove unused pattern until pattern is established