Added Fogbugz post-receive groovy script

I added a fogbugz groovy script that leverages custom fields on the repository, added a junit (not ideal, but better than nothing). I tested in my setup. Below are the custom fields one would need to add to their repo:

fogbugzUrl - base URL to Fogbugz (ie. https://bugs.salsalabs.com/fogbugz/)
fogbugzRepositoryId - (ixRepository value from Fogbugz Source Control configuration screen)
fogbugzCommitMessageRegex - regex pattern used to match on bug id