Documentation TODO List

• Document non-traits for yaml and what their options are. E.g. sequences, player references, actor inits...
• Go into further depth about the prerequisite and upgrade systems.
• Describe the new projected coordinate system.
• Purge or update severely outdated articles.
• Expand asset creation tutorials.
• Expand map-making tutorials.
• Expand map/mission scripting tutorials.

Grammar, language and style cleanups are always welcome.