[LibGit2] Add .targets for Windows XS build.
Fixed 'Bug 20498 - Source analysis error while typing foreach loop'
Fixed 'Bug 20127 - Fails to show all references of an abstract
method'.
[Misc] Add missing Makefiles to .gitignore.
Updated reference to md-addins
bumped debugger-libs
[Debugger] Updated unit tests & code cleanup
Updated reference to md-addins
Bump MD version
bumped debugger-libs
[Debugger] When executing custom sdb debugger, don't use shell execute

Fixes bug #20504 (patch thanks to Sungkyun Kim)
Use an empty entryset rather than null. This fixes an occasional NRE error in MDMenu.
More madness