sptsmuxer: Single program transport stream muxer

WHAT IT IS
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1. Single program transport stream muxer.
2. An element of gstreamer.
3. support H.264 and AAC.
4. The ts stream is self indexed, can be random accessed without index file.
5. Can generate fast forward and rewinding ts stream on the fly.

HOW TO USE IT
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gst-launch-0.10 --gst-plugin-path=src/.libs alsasrc device=hw:1 ! audio/x-raw-int,rate=44100 ! queue ! faac outputformat=1 ! queue ! sptsmuxer name=muxer pushbufsize=7 ! udpsink host=192.168.0.152 port=12345 v4l2src ! video/x-raw-yuv,width=720 ! queue ! x264enc byte-stream=true threads=0 key-int-max=50 bitrate=1200 bframes=1 qp-min=1 qp-max=51 qp-step=50 vbv-buf-capacity=300 ! queue ! muxer.