fix build warning (Warning	3 "C:\windows\Microsoft.NET\Framework\v4.0.30319\Microsoft.CSharp.targets" cannot be imported again. It was already imported at "[...]gitextensions\GitExtensionsTest\GitCommands\GitCommandsTest.csproj (43,3)". This is most likely a build authoring error. This subsequent import will be ignored.)
Merge pull request #1 from feinstaub/topic_fixwarning

fix build warning
fixing failing test on mono
fixing failing test, from fixed value to expected value
Merge pull request #2 from fraga/fix_Save_test

fixing failing test, from fixed value to expected value
Revert "fixing failing test on mono"

This reverts commit f89370319ec6a2f64f1ecb420362005caf4294fc.
implementing #if allowing use of Parallel.For when it's not mono
removing warning message  unused variable
Add test for GitBlame
Add test for GitBlameHeader
adding system.core as reference
Add tests for GitCheckoutBranchCmd
fixing test namespaces
Add Test for GitCommandCache
Fixing whitespaces
Merge pull request #6 from fraga/MoreCoveringTests

Adding more covering tests
Fixing white spaces
Merge pull request #7 from fraga/fixFailingTest_mono

Fix failing test on mono
Updated with latest code changes
DateString() tests improved