Changed subscribers
Removed unused dependencies
Refactoring of config.
Added json renderer.
Merge branch 'feature/rating'
Refs #25007 added tests for login, logout, profile pages.
Merge branch 'master' of https://github.com/aremnev/imagerate
Changed test port.
Refs #25007 added mongodb service in travis config.
Refs #25007 added contests tests.
Changed response on image uploading.
Merge branch 'master' into dev

Conflicts:
	app/controllers/contests.js