v0.0.3-pre6alpha

Major:

• Vast revamp of rendering code to (eventually) enable some new graphical features.
• Vast revamp of map generation code to start building better world maps.

Quite frankly most of the development time went into those. The good news is I don't have to do them again, but it really was a *huge* timedrain. Such is life.

Graphics:

• Added grass! Dirt can now have grass. This is the first part of a general decoration pass.

Fixes:

• Monsters now deallocate properly when they're sufficiently far enough away from the player.
• Monsters no longer spawn in impossible locations.
• Debug graphics now overlay correctly on everything instead of being a flickery mess.

Plot:

• Go explore! You might find some stuff.