Modified PinchLayer.js, as well as Loader.js and example files, to work with the new KineticJS 4.7.4

- Basic support for detecting both mouse pointers and touches.
- Transitions are now using the new Kinetic.Tween api instead of the deprecated transitionTo()
- Loader.js is also updated
- Renamed Kinetic.Global.Assets to Kinetic.Assets in line with the above upgrades
- Example files are also updated