[WIP] Git remotes

[AnthonySteele]

Git remotes

Work for #560

[AnthonySteele]

I am going to close this PR. I might try a different approach some time.
I was aiming at getting the "local repo" to work with github.
We can inspect the local repo folder and ask libgit2sharp for the remotes, and it come back successfully as e.g. in my case: origin: git@github.com:AnthonySteele/NuKeeper.git
This is a URL, but only if you prefix it with ssh, e.g. ssh:git@github.com:AnthonySteele/NuKeeper.git

The issue is that LibGit2sharp does not support these sh urls well: libgit2/libgit2sharp#1422
I get LibGit2SharpException : unsupported URL protocol

So there's no point parsing them.
You can probably build an equivalent https github url for the ssh url, not sure if that's a bad hack?