refactor js

Uses bailey.js as scripting language and adds a angular app to load data
and make pagination for the stats graph
fix pagination colors
make the last graph slice be shown
Merge branch 'master' of github.com:webkom/coffee into angular

Conflicts:
	coffee/static/coffee.js
	requirements.txt
remove unused jquery listener
Merge pull request #21 from webkom/angular

Rewrite the frontend to use angular and add pagination to the chart