Changes to support Mono and XamarinStudio.
Downgrade MVC from 4.0 to 3.0 due to lack of Mono support.
Remove Android templates from tree.
Remove ModelConstruct as it is redundant.
Add IContainerXmlObject, IContentContainerXmlObject, and IItemsContainerXmlObject support.
Template updates to support better test geenration.
FYI: support commit of upcoming v5.0.0.