Added inline call to extprops for repo information
a references broke in last commit. Added Endpoint to get issues.
Removed extension_src from tracking.

Like db will cause endless merges if anyone has to blow it away like I did.
Refactored event token management. Use Strategy Builder to make it easy. Overload EventStrategyBase to add new gitHub events.
Merge branch 'master' of https://github.com/jivesoftware/GitHub4Jive