Updated colors for main page tiles
Fixed MasterPage endless loading of items
Added SignalR Hub for Articles
Don't cache http requests by default
When calling "DownloadPagedArticles" always the first page will be used
Article Master Page now listens for SignalR push and refreshes the data
Added temporary workaround so we always get actual data
Merge branch 'XamarinFormsClient' of https://github.com/ChristianWeyer/myProducts-End-to-End into XamarinFormsClient

Conflicts:
	src/myProducts.Xamarin/myProducts.Xamarin.Views/Components/MainPageHubItem.cs
	src/myProducts.Xamarin/myProducts.Xamarin.Views/Pages/MainPage.cs