* src/stream_output/stream_output.c, include/stream_output.h: new sout_AccessOutRead() funcion.
* modules/access_output/file.c: implemented sout_AccessOutRead().
* modules/access_output/udp.c: coding style cleanup.
* modules/mux/mp4.c: Added support for generating "fast start" files (ie. with the moov header at the beginning of the file).
   Started some code cleanup.