Commented function
- Named and commented Func_4c70.
- Removed gfx/diagonal_lines.png, which is not actually graphics.
Labelled many functions/variables
Add comments regarding menus and sprites
Labelled and commented mostly sprite-related things
Commented more sprite and map code
Commented/labelled misc functions
Merge remote-tracking branch 'YamaArashi/master'

Conflicts:
	constants/misc_constants.asm
	engine/battle/core.asm
	engine/menu/pokedex.asm
	engine/town_map.asm
	home.asm
	hram.asm