initial added module
Merge branch 'master' into xunit2_support
added helper in project file
Cloned XUnitHelper.fs to XUnit2Helper.fs and modified to match the new arguments of xUnit2
Merge branch 'master' of https://github.com/fsharp/FAKE into xunit2_support
autoopen removed as requested
Merge pull request #575 from mantzas/xunit2_support

Xunit2 support WIP