API for social network. Posting on user page
Merge branch 'live' of github.com:OlegYarosh/pin into profile

Conflicts:
	api_server.py
change name API
add signup file
Merge branch 'live' of github.com:OlegYarosh/pin into live
API for social network. Posting on user page. Fix.
commented signup apis register method
Merge branch 'live' of github.com:OlegYarosh/pin into live
Profile APIs: add feature share PINs
some fix
fix
After CR fixes:

 Better name for response_or_user information
 Some tweaks to request validation (checking if fields not relevant to the db schema are passed)
 Removed status = 200 from api_response calls
Merge branch 'live' of github.com:OlegYarosh/pin into profile

Conflicts:
	api/views/base.py
	api/views/profile.py