This commit serves as a baseline to test CfL in video sequences. This
starting baseline uses CfL only in intra frames. This allows to measure
the contribution of CfL in intra frames over the whole video sequence.

Results on Objective-1-fast (Compare to master with CfL disabled)
   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.1869 | -2.4708 | -1.9988 |  -0.1725 | -0.1390 | -0.1453 |    -0.9564

https://arewecompressedyet.com/?job=master%402017-09-13&job=cfl-no-inter%402017-09-13

Change-Id: I20b2f239455b43e977588dc738b21e0508ad9333