Merge branch 'release-0.3.2' into develop
add `beforetransition` & `error` event
add action filter
update doc
fix typo
fix for android 4.0.x, typeof /a/ == 'function' Orz...
can stop action `leave`(and `sleep`) in event handler
update deps
update doc
update doc
Merge branch 'develop' of github.com:ecomfe/saber-firework into develop

Conflicts:
	README.md
release 0.4.0
Merge branch 'release-0.4.0'