Merge "Some refactoring and cleanups of interp filter" into nextgenv2

diff --cc vp10/common/blockd.h
Simple merge

diff --cc vp10/common/entropymode.c
Simple merge

diff --cc vp10/common/reconinter.h
Simple merge

diff --cc vp10/decoder/decodeframe.c
Simple merge

diff --cc vp10/decoder/decodemv.c
Simple merge

diff --cc vp10/encoder/bitstream.c
Simple merge

diff --cc vp10/encoder/encodeframe.c
Simple merge

diff --cc vp10/encoder/rdopt.c
Simple merge