- cleaned up authentification part for dropbox connector:
* login & logout now work as expected
* automatic reloging works as well
* auto cleanup of url params after dropbox redirect done too
* cleaned up & updated backbone.dropbox : better error handling, login & logout now return defferds
* added unminified version of dropbox.js , for easier debugging

- added a gitHub connector , that is just a straight copy of the dropbox connector
 * not sure how/if it will work, but is worth a try again

- some projectBrowser view & template minor fixes and cleanup