Adding a VP8 encoder that uses fixed QPs that can be different
between frame types.

Added an installer that patches the VP8 encoder to support these
parameters, and creates a separate binary (vp8-mpeg) for it.

Added scripts for listing all encodings for a file, and analyzing
the sensitivity of bitrate/PSNR to small changes from the optimum.

Change-Id: I9bc81e29e3606178d4322dfe848f12d2fbddcf8b
18 files changed