CreatePullRequestForm crash fixed. Closes #1727
Support loading dll's from Plugins folder
Show error callstack
Let NBug handle unexpected exceptions
Updated msysgit to 1.8.3
Changed download page to sourceforge. Added link to online manual.
Merge branch 'release/2.44'

Conflicts:
	GitUI/CommandsDialogs/FormBrowse.cs
	GitUI/CommandsDialogs/RepoHosting/CreatePullRequestForm.cs
	GitUI/UserControls/RevisionGrid.cs
Updating current file in commit window improved
Clean up and using xbuild to build mono targeting full framework

We don't need anymore to apply mono batches in order to build mono. Instead, now if you just run the script under Build we will clean the solution and then build targeting full framework