Merge pull request #1 from kentaromiura/master

Clean up installing/running infos
adding basic rotation
Adding raw crazy animation
correct the way the animation works
fixing rotation
Merge pull request #2 from kentaromiura/experimental

Experimental
Fixing spritesheet. Removing accidentally checked in symlink
Spinny bird
Adding wrapup AND some *special* logic, if you know what I mean *wink* *wink*