Update version-checks (Bumped md-addins)
Bump xwt to match md-addins
Fixed 'Bug 21237 - Underscores are removed from "Resolve" options'.
Fixed 'Bug 21233 - References DLL updated but code model not updated'.
Fixed 'Bug 21281 - Highlight usage doesn't update properly when
clicking on an already highlighted var'.
[Ide] Fix incorrect icon registration
[Ide] Fix icon registration issue
[Ide] Save file status on start build.
I first thought that the file status may be up to date. But that won't
work if another solution has been opened without changing the focus.
Merge branch 'master' into preview-ios8-l-branch

Conflicts:
	version-checks