Log Message:
Add games/naev. Based on work by Yorick Hardy in pkgsrc-wip.

NAEV is a 2D space trading and combat game, in a similar vein to
Escape Velocity. NAEV is played from a top-down perspective, featuring
fast-paced combat, many ships and outfits, and a large galaxy to explore.
The game is highly open-ended, letting players proceed at their own paces.