Merge branch 'hotfix/Entity-clip'
change getTime in the case of performance.webkitNow|now and revert Core#currentTime specification
fix issue about frame interval
Merge branch 'hotfix/adjust-frame-interval'
Merge branch 'hotfix/adjust-frame-interval' into develop
enable animation when loading
avoid issue 177 #177
Merge branch 'hotfix/loading-animation' into develop
lint