Xunit2 support WIP

XUnit 2 has a breaking changes
Arguments are now preffixed with "-" instead of "/".
Some argument went away, new ones were added. (parallel , appveyor support)

please remove the autoopen

2014-10-28 13:03 GMT+01:00 Sotirios Mantziaris <notifications@github.com>:

> In src/app/FakeLib/UnitTest/XUnit2Helper.fs:
>
> > @@ -0,0 +1,192 @@
> > +﻿[<AutoOpen>]
> > +/// Contains tasks to run [xUnit](http://xunit.codeplex.com/) unit tests.
> > +module Fake.XUnit2Helper
> > +
> > +open System
> > +open System.IO
> > +open System.Text
> > +
> > +(*
>
> autoopen or the rest?
> Keep in mind this is a copy of the XUnitHelper.
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/fsharp/FAKE/pull/575/files#r19465721>.
>