Use Int32Array instead of Uint32Array in zipfile.js and gfx.js. Fixes #730
Revoke object URL to avoid ImagePlayer's leak. Fix #706.
Merge pull request #734 from yxl/object-url-leak

Revoke object URL to avoid ImagePlayer's leak. Fix #706.
Merge pull request #738 from marco-c/int32array

Use Int32Array instead of Uint32Array in zipfile.js and gfx.js
Implement GESTURE_FLICK event.