Updated references to xwt, md-addins
bumped version-checks for md-addins afix
[Debugger] code cleanup
[Debugger] Improved the look of the ExceptionCaughtDialog
[Debugger] Oops, forgot to add a file
[Debugger] sprinkled some magic readonly dust
[Core] Include external MonoDoc directory on Windows

BXC7813 - Does not show API documentation
Merge branch 'master' of github.com:mono/monodevelop
[MacPlatform] Instead of throwing exceptions on unknown keychain errors, just return null

Fixes bug #16017
Bump xwt, md-addins
[CBinding] BXC15898 - Build fails if solution contains multiple platforms
Updated package version to 4.2
Updated add-ins version to 4.2
[Core] Set Solution* MSbuild properties

BXC15964 - All $(Solution) Macros for build events are undefined
Merge branch 'master' of github.com:mono/monodevelop
[build] Bump xwt and md-addins
code cleanup
bumped version-checks to fix the build
Fixed 'Bug 15962 - [regression] Solution-wide code-formatting settings
are no longer respected'
Fixed 'Bug 15985 - Implement abstract type produces invalid code'