first refactoring pass : 
- distinct draw path for Open GL ES
- use newt events as primary event types
- partial AWT classes removal

Mouse event are partially broken : click are ok, drags are lost in a
simple AWT Canvas test. Next step is development of a working Android
subset.
upd
https://github.com/jzy3d/jzy3d-api/issues/21: merged GL2>GL|GLES, extracted AWT code and dependencies in src/awt. Should remain in this project for a while before being extracted in a module
https://github.com/jzy3d/jzy3d-api/issues/22 separate SWT + cleanup https://github.com/jzy3d/jzy3d-api/issues/21