Switch ReactiveUI to Profile259 which includes WPA81
Retarget the WinRT projects to include WPA81.
Also Testing.
Update Orientation.
iOS refenreces.
In line.
Fix some references.
Simplify the WinMetadata includes.
Fix missing references.
Add Events_WPA81 and Events_WP81.
Events_WinRT only targets Windows 8.1
Remove wrong and unneeded reference.
Add ReactiveUi.Platforms for WP81 Silverlight.
Merge remote-tracking branch 'origin/rxui6-master' into wpa81

Conflicts:
	Playground-Android/Resources/Resource.designer.cs
	ReactiveUI.Tests/Resources/Resource.designer.cs
Update Splat to 1.3.1 final
Update build paths
Update MakeRelease for new profile
Update platforms for NuGet templates
Merge pull request #552 from reactiveui/wpa81

[WIP] Universal App support.