asteroids(1) now uses chvideomode(1) if no driver is active.
Made the asteroids game object oriented.
Added asteroids to ateroids(1).
uptime(2) in asteroids.
C and C++ files are now kept together and so are the mxmpp declarations.
Header files are now stored in include/ and mxmpp'd into preproc/.
All other code now -I ../libmaxsi/preproc.
And other stuff to make this happen, including refactoring Makefile.
