Added image cover for Article and avatar for User.
Merge branch 'master' into images-for-user-and-article
Merge branch 'master' of github.com:manshar/manshar into images-for-user-and-article
Added ability to upload user avatar and article cover to web-client with custom service to handle files with previews.
Fixed jshints warnings and removed unused stuff.
Merge pull request #27 from manshar/images-for-user-and-article

Images for user and article