MvvmCross/MvvmCross — pull request #687 by patsissons (2014-05-14 02:59:02+00:00)
Title: adding IMvxNotifyPropertyChanged extension methods 

to simplify notification property setters

e.g.,
```csharp
private string _hello = default(string);
public string Hello
{
get { return _hello; }
set { this.RaiseAndSetIfChanged(ref _hello, value, () => Hello); }
}
```

Based on the work of paulcbetts in the reactiveui project
See https://github.com/reactiveui/ReactiveUI/blob/rxui6-master/ReactiveUI/ReactiveObject.cs