Added .NET Core implementation of Todo-MVP

[rejdzu]

Hi,
I've added implementation in C# .Net Core. This is using basic http servers available in framework. This could be extended to use ASP.NET MVC with controllers if someone would like to have it. Right now I went for solution that actually is dealing with HTTP server without any abstraction from frameworks like MVC

[gypsydave5]

Hey @rejdzu - thanks for this PR. So sorry it's taken me this long to get back to you - life, eh?

I've just run the acceptance tests against your app - all looking good apart from the incredibly fragile and annoying final test that basically checks that the HTML looks the same. This is probabaly just whitespace errors.

If you've got a few minutes, I'd really appreciate it if you could see if you could fix it? Otherwise I'll have to wait for me to get round to making the test a little less picky...

Thanks again though - sorry I failed to get back to you sooner.