Include fixes for
- #277: Templates download in background
- #311: Initial offline support for wizard (templates shipped w/ VSIX)
- #326: Clicking OK on Toast Notification restarts app
- #327: Prior Windows SDK no longer a requirement
- #329: Build Errors - must add a reference to assembly 'Windows, Version=255.255.255.255
- #357: VSIX / WTS needs to better handle incorrect versions of VS and Windows