-Looping syncslaves are stopped when there is no syncmaster.
-Hardened against edge cases regarding soundsource priority sorting.
-Fixed issue with syncmasters being marked as having looped when instead they just started playing (caused double-start of syncslaves).
-Updated some comments.
-Idle tick is now responsible for dispatching all pending sound sources, as such improves priority sorting.
-Added ui sound precache mechanisms (to fetch sounds without associated soundsources)
-Audio engine no logner available pre-login or upon disconnect, for simplicity.
-General cleanup to the audio engine/impl.
-Fixed some gAudiop calls that were lacking prerequisite null checks.
-Added 'isUpstreamOK' procuedure to LLAssetStorage to allow avoidance of making requests when there is no upstream host connection.
Added stricter checking for fmodex errors.
Demote a harmless message from llinfos to lldebugs when audio buffers are all consumed.
Initialize LLAudioBuffer member variables.
-LLAudioBuffer::mInUse is inited to TRUE to avoid buffers that just got created from getting deleted during the same frame by new audio sources further down the chain.
Looping sounds were always showing as 'Looping', even after they
stopped. Detection of stopped sounds is much better now.
Instead of only logging a sound as stopped when the audio source
is destroyed, we now detect whether or not it is associated with
an audio channel or not (the normal way to stop a sound is to set
the channel to NULL). This is still a bit fuzzy, since an
audio channel doesn't necessarily have to be playing, but states
where an audio source is associated with a non-playing audio channel
are only short temporary states that don't affect the usefulness
of the sound explorer.
-Fixed refrences to secondlife-bin.exe in build scripts
-Added ability to blacklist sounds through Sound Explorer floater.
-Added a missing color to the silver skin
