I added some features into the AudioStreamer#19

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sprhawk wants to merge 11 commits intoDigitalDJ:masterfrom sprhawk:master

+457-186

Commits on Dec 10, 2011

added local file stream support; added prebuffering and a new thread to push buffer into audio queue(to pre-buffer audio file as soon as possible, to minimize influence of network various (specific…
sprhawk
committed
added local file streaming to SHOUTCAST; fixed set streamer = NULL if openReadStream failed; added macro switch to turn on/off prebuffering feature
sprhawk
committed

Commits on Dec 11, 2011

added property ivar declaration to .h, which is required under MacOSX
sprhawk
committed

Commits on Dec 13, 2011

added synchronization to _bufferPushingThread
sprhawk
committed

Commits on Dec 14, 2011