iOS version bump

Ignore sample generated files

Reviewed By: LazyChild

Differential Revision: D4428902

fbshipit-source-id: 59e2cca9673feb81cf4998fcfb2c70e1527ecf2c

Android: add playOnce()

Summary:
Add `playOnce()` that will play the animation only once and stops at the end
Closes facebookarchive#94

Differential Revision: D4385175

Pulled By: lozzle

fbshipit-source-id: 8b2f65003bfb9a3cfc040e90385369d13e1025c5

Merge pull request facebookarchive#55 from LazyChild/header-fix

fix header code style