[#71278170, #71614202, #71621474] The add friend button changes to Unfriend depending on if two users are friends. 404 error is displayed for users who arent logged in. A friendship cant be created with nil user ids

Signed-off-by: Mike Kauffman <mike.a.kauffman@gmail.com>
Merge branch 'master' of github.com:gSchool/g2-social-network