SWFTimelineContainer: allow all_tags_of_type to optionally recurse. SWFTimelineContainer: build_dictionary: add. TagDefineScalingGrid: doesn't define a standard character.
SWFTimelineContainer: allow all_tags_of_type to optionally recurse.
SWFTimelineContainer: build_dictionary: add.
TagDefineScalingGrid: doesn't define a standard character.

knifeyspoony/pyswf,timknip/pyswf,frbapolkosnik/pyswf