* Add AppContainerApplication to non-UTILITY targets
* Generate app manifest and related files if project does not provide them.
Place them in a per-target directory to avoid clashes.
* Mark WinRT components with WinMDAssembly
* Import Windows Phone 8.0 targets in .vcxproj files when necessary,
and reference platform.winmd.
Inspired-by: Paul Annetts <paul@lightunobscured.com>
