Fix server selection in graphs.
Fix broken widget removal.
Merge pull request #17 from prometheus/fix/servers

Fix server selection and widget removal.
Merge branch 'master' of github.com:prometheus/promdash

Conflicts:
	app/assets/javascripts/angular/controllers/graph_ctrl.js
	app/assets/javascripts/angular/directives/frame.js
	app/assets/javascripts/angular/directives/graph.js
	app/views/dashboards/show.html.erb
update class names