DDF-350 Moved to using wreqr for communication between views.

- Using wreqr for all messaging between views.  Still using Backbone
  events for messages internal to a single object.
- Using _.bind so subscriptions can be moved into init methods with
  proper scope.
- Cleaned up application to use Marionette more to remove boilerplate 
  code and removed the model on the application that was not used.
DDF-350 Fixed regressions in IE and Firefox.

- Removed a call to console for IE.
- Fixed a regression on the height of Cesium in Firefox.