Revert 604eb92..dfe6331

This rolls back to commit 604eb92fdff90b434b0dc01098263cd09a556d03.
Revert "color 모델 수정 및 colorset 추가"

This reverts commit 604eb92fdff90b434b0dc01098263cd09a556d03.

Conflicts:
	assets/controller/layers/layer.js
	assets/controller/layers/layers.js
	assets/model/colors.js
	assets/prototype2.js