Made the code compatible with PHP 5.3 as that's what the main server (currently) runs
Introduce a User entity.
Store the logged in user's info to mongo
Move fully qualified class name to a use statement
Added slugify global function
Merge branch 'feature/add-talk-page' of https://github.com/Spabby/joindin-web2 into feature/add-talk-page

Conflicts:
	app/Joindin/Service/Helper/Slug.php
Merge branch 'feature/add-talk-page' of github.com:magicmonkey/joindin-web2 into feature/add-talk-page
Merge branch 'feature/add-talk-page' of github.com:magicmonkey/joindin-web2 into magicmonkey-feature/add-talk-page