Upgraded to work with SignalR 1.0.1

* Only the Server project has been tested, don't know if the Win8 one
works
Enabled nuget package restore
Cleaned up in the nuget packages
Upgraded Win8 app to work with signalr 1.0.1
Updated url to on readme to demo version
Merge pull request #1 from Laumania/master

Upgraded to work with SignalR 1.0.1 (currently latest version)