finally fixed vertical velocity of Character on DynamicPlatform
modify jump
merged with quiz branch
need to fix jump bug (character standing on platform touch other platform)
jumping zombies O_O
moved and deleted some platforms
add ground physical body, without class (need to write class)
jump on platforms without bugs (i hope)
add ground class for check collision with platform's top
add second player
bugged horizontal scrolling with horror effect
add new horizontal and vertical scrolling with new bugs
style correct
Merge branch 'quiz' into base

Conflicts:
	Zend/Zend.xcodeproj/project.pbxproj
	Zend/Zend/Character.h
	Zend/Zend/Character.m
	Zend/Zend/FatZombie.m
	Zend/Zend/GameScene.h
	Zend/Zend/GameScene.m
	Zend/Zend/Human.m
	Zend/Zend/Level.h
	Zend/Zend/Level.m
	Zend/Zend/Levels/Level0/platforms.json
	Zend/Zend/Levels/Level0/zombies.json
	Zend/Zend/Platform.h
	Zend/Zend/Platform.m
	Zend/Zend/PlatformFactory.h
	Zend/Zend/PlayerControl.h
	Zend/Zend/PlayerControl.m
	Zend/Zend/SkinnyZombie.m
merge branches base and quiz
Merge remote-tracking branch 'origin/base' into quiz

Conflicts:
	Zend/Zend/Level.m