Undone changes done during the presentation.
Merge branch 'master' into before-presentation

Conflicts:
	NotifyPropertyChangedDemo/NotifyPropertyChangedDemo.csproj
	NotifyPropertyChangedDemo/packages.config
	ReaderWriterSynchronizedDemo/ReaderWriterSynchronizedDemo.csproj
	ReaderWriterSynchronizedDemo/ReaderWriterSynchronizedDemo.psproj
	ReaderWriterSynchronizedDemo/SynchronizedOrder.cs
	ReaderWriterSynchronizedDemo/packages.config
Updated PostSharp.
Updated PostSharp and added aspects.