Delete some unused stuff; there were two unused m3u8 classes and a metadata class that was just a thin wrapper around OSMF's MetaData.
1. A fix for seeking on startup; fix is described here: http://forums.adobe.com/thread/1054095 - one caveat specific to HLS is if your streamtype is set to liveOrRecorded, it won't work correctly (need to dig into this more)
2. A fix for 404 not found on .ts segments; debatable if this should be fixed?  Some URLs seems to contain missing .ts segments, and the stream can basically play on even given they're missing, but it seems a little silly to humor this sort of thing client side.
Fix two bugs:

1. Issue where when playing files in the same player instance, an old event handler wasn't removed but its variables were zapped.  Instant 1009 null reference.  Boo.
2. Fix issue where for multi-bitrate streams the code would load wrong file initially (always the zero index file)
Some cleanup - removed unnecessary class HTTPStreaming M3U8NetLoader, renamed some variables for clarity, comments, etc.
Fix a bug seeking backwards--the code only checked to see if the current tag's time was less than the seek target, which didn't work correctly when seeking _backwards_.  Add a check to see if we were seeking backwards, and also if the current time was still greater than the time prior to seeking.
Merge pull request #34 from jnoring/master

Bugfixes, including one for seeking backwards not working correctly.