Merges Guillaume Poirier's AltiVec changes:
-rw-r--r-- 2086 AUTHORS
-rw-r--r-- 17992 COPYING
-rw-r--r-- 5104 Makefile
drwxr-xr-x - build
drwxr-xr-x - common
-rwxr-xr-x 44208 config.guess
-rwxr-xr-x 9130 configure
drwxr-xr-x - doc
drwxr-xr-x - encoder
drwxr-xr-x - extras
drwxr-xr-x - gtk
-rw-r--r-- 13074 matroska.c
-rw-r--r-- 1774 matroska.h
-rw-r--r-- 26190 muxers.c
-rw-r--r-- 2194 muxers.h
drwxr-xr-x - tools
-rwxr-xr-x 375 version.sh
-rw-r--r-- 35862 x264.c
-rw-r--r-- 16549 x264.h