Remove unused dependency.
Refactor visualizations:

The main code doesn't know about individual visualizations and each visualization is contained in its own module. Should make adding/editing/removing visualizations easier.
Fix switch regular expression.
Fix chart editor declaration.
Remove the need to declare each visualization module in app dependencies.
typo fix
Rename Visaulization to VisualizationProvider
Fix: reset visualization form after saving visualization
Switch to config object instead of millions of params
Fixes #81: reset query when saving widget
Set default name when creating
Merge pull request #100 from EverythingMe/feature_visualization_options

Visualizations refactor