* add tests to ensure already existing users get associated with a new proposal when they are specified in team
* serilaize avatar, social_medias on user; add tests
* add user resource GET API; test
* remove commented out serializer stuff
* check in progress
* revert
* fix up API, add tests
* remove unused milestone commands
* support filtering users via proposalId
* get UI working
* refactoring / add minimum team size.
* fix proposal create API to properly support both email and account based