renamed GitHupAPI.Net, took non-standard  dashes out of namespace, fleshed out Issues & Issue Comments, Added non-nunit based test project

Although written in Csharp...this should work for all .NET languages as
it's a compiled assembly
I've very rarely come across dashes in a namespace in .net
Nunit doesn't work in Express product, the test adapter isn't available,
moving to VSTests would open up more to free development