Refactor infographic screen into Backbone view.

Moved the infographic rendering logic into a Backbone view, moved state
information to the Plugin model, and removed all infographic logic and
event bubbling from the PluginObject implementation.
Revert overriding Plugin model getter/setters
Do not show infographic when restoring a minimized plugin
Merge pull request #212 from kdeloach/topic/infographic-backbone

Refactor infographic screen into Backbone view.