Global routing and view management
Merge pull request #47 from Kitware/global-routing-view-management

Global routing and view management
Bring back workbench/dashboard
Fix various workbench issue
Merge pull request #48 from Kitware/add-workbench-view

Bring back workbench/dashboard
added colormap icon.
created lookup table widget on ViewportCompositeView.js. Will move it eventually to ViewportDynamicRenderingCompositeView.js.
look and feel for out editor, need to hookup the logic
added swatch selection.
update rendering control ui look and feel.
fixed rendering form to work with master
Merge pull request #49 from Kitware/new-colormap

New colormap
Rewrite of the pipeline control widget

The pipeline control widget now stores its state in the
layer model, where most of the complicated logic has been moved.
The layer model stores additional information internally to
cache things like color and visibility.

One change from previous behavior is that (by default) all layers
will be hidden.  The default behavior can be changed by providing
a query string as the first argument to the constructor.