Added a plugin for displaying a layers history. it's a work in progress...
Added a geogit utilities plugin that can be used by other plugins associated with geogit.  Right now it is only used for checking to see if a layer is a geogit layer or not when it is added to the map
Changed the popup created for feature info to be a panel and docked it into the east panel.

This will probably need to be cleaned up a bit and is still a work in progress.