#31 adding delegate feature for open/close animations
Merge pull request #32 from dchohfi/master

#31 adding delegate feature for open/close animation
Implemented ARC

Hello, I've successfully converted the project for ARC for those who
wish to use this in ARC-compatible projects.
Moved Custon Startpoint Code

Remvoed custom start point code.
Merge pull request #33 from acenario/master

Converted project for ARC.
Merge branch 'master' into center_button_rotation