2D side-viewed multi-player single-keyboard dogfighting shenanigans!

Inspired by many happy hours playing a similar game with 4 people crowded round 
an Amiga.

Still very much a work in progress.

RUNNING THE GAME

ThoseMagnificentMen [numberOfHumanPlayers] [numberOfBots]

The total number of players (humans and bots) is capped at four, so you can't 
have 3 people and 3 bots - you'll end up with 3 people and 1 bot.

CONTROLS

Player 1 (red)
Turn anti-clockwise:    Z
Turn clockwise:         X
Fire:                   C

Player 2 (green)
Turn anti-clockwise:    I
Turn clockwise:         O
Fire:                   P

Player 3 (blue)
Turn anti-clockwise:    left arrow
Turn clockwise:         right arrow
Fire:                   up arrow

Player 4 (yellow)
Turn anti-clockwise:    numpad 4
Turn clockwise:         numpad 5
Fire:                   numpad 6

TODO

- Font rendering
- Customisable controls
- Sound
- Music