Improved swipe detectio & scaling

- Added a check to CWGestures that prevents swipes were a user swipes in a direction, than changes the direction, than resumes the initial direction. Now only touches that swipe in a single direction for the entire duration of the touch will be recognized as a pinchswipe
- Introduces scaling to CWPinchManager. Each device now gets a scaling based on its dpi ratio to the master device, which can be used to make sure elements have the same size on all devices
	- Right now, the DPI is hardcoded, this is still “under construction”
	- There seems to be a bug with this, only one of the two axis is correctly scaled, but I am unsure why as of now