Allow panorama dragging using touch.
Enable touch Manipulation events on Panorama control
Readd missing space.
Use PreviewTouchMove and PreviewTouchDown
* Refactor Mouse and Touch events.
* Allow movement with touch using velocity just like mouse.
* Change private vars to camelCase.
* Remove regions
Formatting.
Merge branch 'master' of https://github.com/MahApps/MahApps.Metro

Conflicts:
	MahApps.Metro/Controls/Panorama.cs
Merge pull request #376 from sleman/master

Fix for "Dragging panorama on touch screen doesn't work"