Pause Listener Suggestion

[GoogleCodeExporter]

I'm wondering if we should add some kind of Pause Listener class that games 
could implement.  This could both respond to manual ForPlay.pause()-style 
commands and detect if the game loses visibility in a platform-specific way 
(the Android activity losing visibility or the HTML game losing focus, for 
instance).  This could allow games to keep the gameplay from starting up again 
immediately after the game loop restarts, providing a slightly more polished 
experience and preventing issues like, e.g., a player reloading a rhythm game 
only to have it immediately start moving and losing him points.

Original issue reported on code.google.com by [email protected] on 5 Aug 2011 at 5:11