post /clients returns 201 with admin credentials
post /clients returns 401 with no creds
post /clients returns 401 with invalid creds
post /clients returns 403 for non-admin creds
move post /clients admin creds test
post /clients returns data with admin creds
post /clients sets location header
post /clients persists client data
post /clients supports scopes
bugfix in posix ui provider
sort returned client scopes
sort fields in Client.as_dict
make created_at an integer
Merge pull request #3 from mark-burnett/client-registration

Add basic client registration