[Fix bug 1059076] Add profile photo thumbnail to /users endpoint.
[fix bug 1030673] List common skills among group members.
Merge pull request #1087 from johngian/1059076-thumbnails

[Fix bug 1059076] Add profile photo thumbnail to /users endpoint.
Merge pull request #1088 from akatsoulas/1030673

[fix bug 1030673] List common skills among group members.