trigger pointer events on stage even without any node under pointer (sam...

...e as Flash stage)

- no need any more for stage specific drag code as stage is also a Node
- fic ContainerParams.txt file name to match the Thor file

I decided to have a go implementing stage events with Kinetic.
On this branch: mouse and touch event are triggered on stage even when there is no node under the pointer.

By doing this I could remove the stage specific dragging code 

Please have a look

Let me know if you have any questions