Graph widget axis ticks now correspond to bucket sizes. Also fixed a bug in how class defaults are overriden in ConfigMixin.
Merge branch 'feature/issue-37-serve-time-values-in-milliseconds' into feature/issue-36-graph-widget-hover-effect
Merge branch 'feature/issue-37-serve-time-values-in-milliseconds' into feature/issue-36-graph-widget-hover-effect

Conflicts:
	diamondash/widgets/graph/graph-widget.js
Merge remote-tracking branch 'origin/feature/issue-37-serve-time-values-in-milliseconds' into feature/issue-36-graph-widget-hover-effect

Conflicts:
	diamondash/public/js/diamondash.js
Graph widgets now have a hover effect.
Removed an unnecessary formatValue variable in GraphWidgetView.render()
Merge branch 'develop' into feature/issue-36-graph-widget-hover-effect
Merge branch 'feature/issue-36-graph-widget-hover-effect' into develop