Revert "Chromeless/FlowPlayer/OSMF: retrieve video width and height from HLSEvent.FRAGMENT_PLAYING"

This reverts commit 671a56033a711833c40cc6e67bd8ba133e2579b2.
related to https://github.com/mangui/flashls/issues/86
fix start_position computation (was sometime -Infinity)
related to https://github.com/mangui/flashls/issues/87
add debug logs
related to #92
improve error logs
improve debug logs
fix player stalling that could happen after level switch on live playlist
related to https://github.com/mangui/flashls/issues/92
rename variables for sake of clarity
force PTS check when switching level. this will ensure flashls will iterate until it find the exact next fragment with correct timestamps
FragmentLoader.as: remove some globals
remove AUDIO_ONLY event, audio_only boolean is reported through HLSPlayMetrics in FRAGMENT_PLAYING event
flashlsOSMF.swf : reduce size from 97kB to 73kB (save 24kB) by excluding unused OSMF classes from swf.
Merge remote-tracking branch 'mangui/master'