Added search form
Merge branch 'master' of https://github.com/BlueForeverI/XamlChat.Client

Conflicts:
	Xaml.Chat.Client/Data/UserPersister.cs
Added profile picture uploading
Merge branch 'master' of https://github.com/BlueForeverI/XamlChat.Client

Conflicts:
	Xaml.Chat.Client/ViewModels/AppViewModel.cs