Android - DetachThread on APP_CMD_DESTROY as it crashed otherwise since it attaches the thread on keyboard input.
Thanks @Neirdan for reporting.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code@4892 dfc29bdd-3216-0410-991c-e03cc46cb475
Proposal for passing through system events. And example adapted to show them. Interface is still under discussion.


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code@4893 dfc29bdd-3216-0410-991c-e03cc46cb475