fix GITUI error.png path
fix GITUI StatusHourglass path
fix GITUI success png path
Fix 1st post build event error on GitHub3.csproj

Current Variable $(SolutionDir) yields ../../ path which is wrong
Fix 2nd post build event error on GitHub3.csproj

Current Variable $(SolutionDir) yields ../../ path which is wrong
Verifying mono version on travis

For debugging purposes only
Adding dummy commands
Fixing nuget.targets folder case for Github3 proj
update NBug ref on TranslationAppMono
update NBug ref on GitExtensionsMono
Merge pull request #2427 from fraga/fixMonoBuild

Fix mono build on travis