HaxeFlixel/flixel — pull request #1243 by shinji-yoshida (2014-07-25 15:17:24+00:00)
Title: FlxGroup: implement revive()

FlxTypedGroup has method kill() that kills all members in group, but revive() did not revive them.
I have implemented revive() so that all members to be revived.
Please merge.