compact (microsoft#617)

Co-authored-by: Kenny Kerr <kenny.kerr@microsoft.com>

Use canonical error message format for standard build tool parsing (m…

…icrosoft#615)

A few minor tweaks to make compatible with build systems (microsoft#613)

Accurate error propagation from RoGetActivationFactory (microsoft#559)

Harden operator wstring_view (microsoft#546)

Fix holes in IObservableVector<IInspectable> (microsoft#544)

Update README.md

Revert "Remove use of umbrella libraries (microsoft#520)" (microsoft#529

)

Fix async for testwinrt (microsoft#515)

Support for x86 builds with Clang (microsoft#511)