restore the original terminal state at endwin(3), explicit termios
tcgetattr(2)/tcsetattr(2) and cleanup handler were added.
+- Disable visible cursor in main input routine stable_getch().
+
BUGS FIXED
==========
at the first hit, there is no effect showing that they have been
hit. A few mini-explosion artifacts like * would be nice.
+- Foes could be animated.
+
- It's still possible that I eventually write my own ASCII shooter,
it'd follow my coding style, be C99, use my libraries and be
under BSDL.