Update scaffolding to PTVS 2.0 Beta 

Updates scaffolding to be inline w/ PTVS 2.0 Beta
    Removes AzureSetup dependency on ServiceRuntime
    Makes AzureSetup runnable on .NET 2 or .NET 4
    Updates wfastcgi to latest version w/ new features and fixes
    Moves to Web.config based configuration for DJANGO_SETTINGS_MODULE and FastCGI handler