Added isDefault parameter to Catalog model, and supporting functionality in the controller.
Modified the catalog edit functionality so that when saving a catalog as default, it also removes default status on the previous default catalog.

This functionality is not currently working, due probably to an API limitation.
Removed the "isDefault" selection functionality from the Shipping catalogs (it is not user-selectable). Added delete non-default catalog functionality.
Merge remote-tracking branch 'merchello/1.3.0' into 1.3.0
Updating the Order View UI, adding comments to the functions in the Order View Controller, moving some supporting files to be better pathed.
Merge remote-tracking branch 'merchello/1.3.0' into 1.3.0
Merge remote-tracking branch 'merchello/1.3.0' into 1.3.0
Added Invoice delete functionality. Slightly modified the Order View page.
Shipping UI design adjustments.
Merge remote-tracking branch 'merchello/1.3.0' into 1.3.0

Conflicts:
	src/Merchello.Web.UI/App_Plugins/Merchello/Package.manifest
Merge remote-tracking branch 'merchello/1.3.0' into 1.3.0
Merge remote-tracking branch 'merchello/1.3.0' into 1.3.0
Merge remote-tracking branch 'merchello/1.3.0' into 1.3.0
Merge pull request #778 from cssquirrel/1.3.0

Order View UI adjustments, Shipping UI adjustments.