This experiment replaces the 16-point Type-II DCT and 16-point Type-IV
DST scaling vp9 transforms with the 16-point orthonormal Daala
transforms.  These have reduced complexity and are perfect
reconstruction.  There is currently no net coding performance impact.

subset-1:

  monty-square-baseline-s1-F@2017-07-23T03:43:45.042Z ->
     monty-square-dct16-s1-F@2017-07-23T03:42:29.805Z

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.0152 | -0.0028 | -0.0929 |  -0.0432 | -0.0457 | -0.0425 |    -0.0237

  objective-1-fast:

  monty-square-baseline-o1f-F@2017-07-23T03:44:19.973Z ->
     monty-square-dct16-o1f-F@2017-07-23T03:43:22.549Z

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
0.0305 |  0.0926 | -0.1600 |   0.0471 | 0.0219 | -0.0075 |     0.0135

Change-Id: I54fed26d65fd8450693334bb400b1fafd7e0dacb