* livedotcom.cpp: use live.com library to read rtsp and sdp file.

    TODO:
        - handle PTS (for now, I just use mdate() :)
        - support TS/PS (hard as it needs a lot of work on TS/PS demuxers).
        - support X-QT and X-QUICKTIME. (I don't know if it's really used).
        - implement pause, seek ...
        - clean up/bugs fixes...
        - ...