Add a play loop, where users only play for the first 15 minutes
Merge branch 'master' of https://github.com/Yeggebomb/yeggebomb

Conflicts:
	code/frontend/static/js_compiled/game.js
	code/frontend/static/js_compiled/game.min.js
Merge branch 'master' of https://github.com/Yeggebomb/yeggebomb