[SDL] New SDL game for list

[Orin K. Tresnjak-Smith]

I've been working on a new game using your (entirely wonderful) SDL
library.  The game is called Angel Wars, and its website is at
angel-wars.sourceforge.net.  It is currently about 50% complete and runs
only under Linux (so far).  I'd appreciate it if you'd add it to the list
of SDL games.  Thanks.  :)