Reworked graph CSS and display time below graph
Merge remote-tracking branch 'upstream/master' into better_graphs
Merge remote-tracking branch 'upstream/master' into better_graphs

Conflicts:
	app/assets/javascripts/app.js.coffee
Add a miniLegend to graphs, displayed by default
Allow to click in mini legend to toggle metrics in graphs
Fix typo in OpenVPN definition
Put graph-specific CSS in a separated file
Use a navbar to display graph title, and add UI to change time period
Small CSS fixes
Use camelCase variables in coffeescript
Merge pull request #38 from renchap/better_graphs

Better graphs