Bootstrap theme Amelia added; Cronjob updated; Bug in PlayerController and Challenge entity fixed.
Navbar fixed; Cronjob updated.
Merge branch 'master' of https://github.com/nfqakademija/group4-studio

Conflicts:
	src/Group4/BaseBundle/Resources/views/Default/index.html.twig
	src/Group4/ChallengeBundle/Entity/Challenge.php