Merge pull request PrismLibrary#995 from PrismLibrary/6.3-release

6.3 release

Merge pull request PrismLibrary#831 from PrismLibrary/6.3-Preview

6.3 preview

Merge pull request PrismLibrary#713 from PrismLibrary/v6.2-Preview

getting nuspecs in order

Merge pull request PrismLibrary#272 from PrismLibrary/Xamarin.Forms

incremented XF version for patch release

Prism.Windows 6.0.1 release

fixed typos

enabled xml documentaion and incremented assemblies to v6.0.1