sprite test
A sprite moves.
moving sprite

(Key inputs are inverted, but the author does not know it.)
colors/key inputs

REG_KEYINPUT is inverted correctly.
Add comments (sprite0.c)

Annotations on object attributes in OAM
Display a sprite((>_<))

Display 2 (>_<)'s
Display 2 sprites((>_<), =>)
Refactoring(sprite_common.(c|h))

moved utility functions from sprite0.h to sprite_common.h
Refactoring

Combined drawSprite0() with setTestSprite1() and removed sprite0.(c|h) and spr.*