MJPEG Tools Svn

change to mga code to allow setting of correct color keying

autoconf/automake for mplex
Rate control overshoot bug fixed (hopefully) in mpeg2enc. Update doco files.

Improved speed with better bit-stream code, fixed a couple of minor
arithmetic bigs. Reinstated the audio time-out tweak. Added automake
support.

Got rid of the (now rather anachronistic) use of temportary files for
the 1st-pass data and slotted in a faster bit-stream reading library.

Added work-around for arithetic conversion bug...

Removing files now auto-generated

No serious modifications ..

Brought mpeg2enc and aenc into the autoconf/automake framework.
Tidied up selection of CPU-specific optimisations.

Added run-time determination of SIMD routines (MMX/SSE)

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