async userService and orgService
other api async
revert fixes for commits for demo purposes
commits async with gcd and paging
rollback spinners for demo
remove gravatar image fetching
commits setRelationshipKeyPathsForPrefetching
batch fetch for commit inserts
logout bug
apparently, commit author from api can be null
return gravatars. use if-modified-since
organization, repo, and branch services if-modified-since
commits view gravatars. moved thumbnail cache to gravatar service.
commit if-modified-since
thumbnail bug
put back spinners