[48243769] restful api: add uploading and downloading photo endpoints using postgres
delete temp file
[48243769] add callbacks to delete the tmp files
[48243769] restful api : set the current_user setter as before_filter
[48243769] rest api: add endpoint to update interview
update for mobile rest api
Merge remote branch 'upstream/master' into temp_api
[PT 49177639] porting the RESTful api over on the file storage layer
fix all unit test fault
Merge remote-tracking branch 'others/api_on_filestorage'

Conflicts:
	Gemfile
Merge pull request #132 from Chunjie/master

[PT 49369103] Merge 'RESTful api' back to master branch