For CpuUsed 1 & 2, this commit allow to skip retangular partition check
when NONE is better than SPLIT. It also changed to allow such logic
on alt ref frame coding rather than use square partition all them. The
change has gain compressio about .3% on yt and ythd for both 1&2, It
helped .6% compression on cif and stdhd for both CpuUsed 1&2.

Change-Id: I814b653baf89f59acd20e042629a12938a1bd4e5

Change-Id: Id093816146de0d100f0c6ae2542aaa427dbab2d8

Change-Id: I38b2100f1a64cb067c63f4e1662c36914b3569df

Change-Id: Ia725748acbc2a3f825f0d208f26522a0412301fa

Adjusts the bits per mb parameter about 10% smaller.

Results at speed 0:
fullderfraw: +0.255%
fullstdhdraw: +0.262%
stdhdraw250: +0.291%

Change-Id: I2b7317ac3f61737bc77eb5470aad870cade83fa5

Slightly bigger change -> broke up encode_frame_to_datarate,  lots
of line length fixes.

Change-Id: I7c53325e954de130f3fe1a6656626efc6705be82

Change-Id: I8de865cd1deca07b5c92c225782f0867367e9a11

Change-Id: Iae7674b0c946a5ac01617840b3f62965c654d920

A new set of MSVC warnings were introduced by change
I3f36d3f7cd8d15195a6e2fafd1777cdaf9ecb847

In particular MSVC does not like:-

typedef const int16_t subpel_kernel[SUBPEL_TAPS];

struct subpix_fn_table {
  const subpel_kernel *filter_x;
  const subpel_kernel *filter_y;
};

causes  new warning in MSVC.
warning C4114: same type qualifier used more than once

Change-Id: Iae596fd13aadf36169faf00c68eabe9a32a9b156

* changes:
  d153 intra prediction (16x16) ssse3 using bytes
  d153 intra prediction ssse3 using bytes

Renames:
  vp9_short_idct8x8_add    -> vp9_idct8x8_64_add
  vp9_short_idct8x8_1_add  -> vp9_idct8x8_1_add
  vp9_short_idct8x8_10_add -> vp9_idct8x8_10_add
  vp9_idct_add_8x8         -> vp9_idct8x8_add

Change-Id: Ifb8d3a45b4c0397aa805b30463f3d14581bf72c1

Change-Id: Ibd0b3414cdea05bc2fd6d0aa35808e44b3db8d96

Change-Id: Ia3030882c5276dc1f8e6b6c82b9eb301f00b6bbc

Change-Id: Id5f25b74e2207bf44b6f6c8ffe548fa30fd78b4d

Change-Id: Ic7b7014a0d857585bfd4baaea1d5c27ffe355642

Change-Id: I2c2f83f4dfa2782fc6b0aa6db3ba2c4e6e423ffa

* changes:
  cpplint issues resolved in vp9_variance_mmx.c
  cpplint issues in vp9_ssim.c

Change-Id: I6990c9ab838323d8770dd1f49a25bf3acc4c05c7

Change-Id: I4f66d6f1aebe7d47ad01cda9b03c600725240680