added and corrected spec files; started creating follow relations and implemented on User; passed test, with the help of an unknown usage of printing u the newly created user
implemented following function; passed test
completed all html for the follow/unfollow functions; passed tests
tried to AJAXify auto update followed-user feeds, but inconsistency in tutorial, gave up; also somehow break old test case of micropost, where successfully calling GET by clicking button for update or new does not direct to correct page