new folder structure. now relation of resources has more priority than extension. .
character skin image moved to GameObject/Character/Instance.
character skin implemented.
part of character scripts moved to GameObject/Character.
Database added.
CharacterSkinDatabase implemented.
Merge branch 'master' of https://github.com/geoidn2/snugdc-project-ricochet into skin

Conflicts:
	SuperCrateBox/Assets/GameObject/Character/Instance/Blue/BLUE_0000_Layer-1.png.meta
	SuperCrateBox/Assets/GameObject/Character/Instance/Blue/BLUE_0001_Layer-3.png.meta
	SuperCrateBox/Assets/GameObject/Character/Instance/Blue/BLUE_0002_Layer-4.png.meta
	SuperCrateBox/Assets/GameObject/Character/Instance/Blue/BLUE_0003_Layer-5.png.meta
	SuperCrateBox/Assets/GameObject/Character/Instance/Blue/BLUE_0004_Layer-6.png.meta
	SuperCrateBox/Assets/GameObject/Character/Instance/Blue/BLUE_0005_Layer-7.png.meta
	SuperCrateBox/Assets/GameObject/Character/character.prefab
	SuperCrateBox/Assets/Sprites/Character/Blue/BLUE_0000_Layer-1.png
	SuperCrateBox/Assets/Sprites/Character/Blue/BLUE_0001_Layer-3.png
	SuperCrateBox/Assets/Sprites/Character/Blue/BLUE_0002_Layer-4.png
	SuperCrateBox/Assets/Sprites/Character/Blue/BLUE_0003_Layer-5.png
	SuperCrateBox/Assets/Sprites/Character/Blue/BLUE_0004_Layer-6.png
	SuperCrateBox/Assets/Sprites/Character/Blue/BLUE_0005_Layer-7.png
add manual to test_character_skin.
restore blue skin.
bind character types.
readme modified.
Merge branch 'master' of https://github.com/geoidn2/snugdc-project-ricochet into skin