all files for main char, including spritesheet

First frame of each direction is the normal pose, which should be used
when the character is not moving. Therefore, animation technically
begins in the second frame onwards
moved old characters to graveyard
Merge branch 'master' of https://github.com/lilyc5459/cs3152

Conflicts:
	Pathogenesis/PathogenesisContent/Characters/main-left.png
	Pathogenesis/PathogenesisContent/Characters/main-right.png