User accessibility features

[Adopted from the Editor Improvements thread]

tazinator, you bring up some good points, like how to make Bitfighter more accessible to new players.

- Revamped editor instructions (Wat would probably agree)
- Wiki pages listing all hotkeys/shortcuts, such as the `click and pressing # keys to change teams -- or should this material be in the instructions? Which do people read more?
- In-game "hint bubbles" that appear across aspects of the game for new users, similar to tutorials in shareware

Thoughts?

[watusimoto]

In-game help, related to what is happening on screen, will be included with 019. It will probably be disabled by default for upgrades, but can be enabled with a menu item should you want to see what you're missing!

Cool!

[watusimoto]

I hope it turns out ok... it was a LOT of work.