remove warning
FragmentLoader.as: decouple _loadfirst/_loadnext by passing args
Level.as : introduce getFragmentBeforePosition()/remove getSeqNumBeforePosition()
suppress one call in FragmentLoader
ChromelessPlayer.as: add default play() position : set it to -1
FragmentLoader.as : decouple furthermore loadfirst/loadnext by moving some logic up in _checkLoading()
Merge branch 'master' of https://github.com/mangui/flashls
Gracefully handle last segments without tags.