Update amf3 sequencer.
Spelling miss fix.
Merge branch 'amf3_dev' of https://github.com/mntone/Data.Amf into amf3_dev

Conflicts:
	Mntone.Data.Amf/Amf3Sequencer.cpp
	Mntone.Data.Amf/Amf3Sequencer.h
	Mntone.Data.Amf/AmfArray.cpp
	Mntone.Data.Amf/AmfValue.cpp