Changes:

Users
-to recieve the user object of the current user make a get request to
/user/myUser
-to recieve the collection of all user objects make get request to /user
-changed permission requirement of get all users so that anyone can make
this request and will actually return all users.

Post
-Bugfix: Users are now allowed to create a new post in any groups they
are manager of.  Previously was mistakenly restricted to only users.