Merge "Copy macroblock data to a buffer before encoding it"

diff --cc vp8/encoder/block.h
Simple merge

diff --cc vp8/encoder/encodeframe.c
Simple merge

diff --cc vp8/encoder/firstpass.c
Simple merge

diff --cc vp8/encoder/pickinter.c
Simple merge

diff --cc vp8/encoder/rdopt.c
Simple merge