Beta1: First named release

So, the first named release is here. It's already live on NuGet (and hopefully everything works). As for why I'm calling it beta1, and not rc1 (or even rc1-final), it's simply due to the fact that just because MS feels DNX might be in Release Candidate state, doesn't mean that the FSharp DNX integration is.

Now I unfortunately probalby have to do some un-clusterfucking of my CI versioning, to make sure the version numbers produced by the CI is "bigger" (according to semver/nuget) than the one on NuGet, but that'll come later. I'll likely adopt the versioning format used by the DNX team, and start producing -beta2-<build_number> builds soon. First I have to cherry-pick some changes from this release back in to master, and make sure master is working again.

NuGet link: https://www.nuget.org/packages/FSharp.Dnx/1.0.0-beta1

Anyways. Please check it out. Hopefully everything works. If not, file an issue.