This adds a test vector for 444 color space.

Change-Id: I1e2ac3883211989a062cfafc0e58151b14d294b8

Adding missed parenthesis around boolean expressions. Bitstream is changed.
Regenerating test vectors.

Change-Id: I4cc00b761e9473f92f180a9fc3a0c607f0aaae56

In the rare case were 4x4 interior filtering was called for but no
8x8 or larger filtering takes place, the previous code was skipping
the filtering. This patch fixes the issue by including the interior
mask in the overall mask for the filter application loops.

Change-Id: I4a0b65056c64f97478827c2ff41e0914fc7779d0

For cases where there's no transform set in bit 0 (the left edge of
the SB) but bit 0 of mask_4x4_int is set (the edge 4 pixels from the
left edge needs filtering), it was incorrectly being skipped before.
This situation only happens on the leftmost edge of the image, as
the edge at column 0 is intentionally skipped since there aren't
pixels to the left to read.

Change-Id: Ib2fbbcb40166e90af31b1a0e13b85b68c226cbd3

Tests resolutions of 8, 10, 16, 18, 32, 34, 64, 66 to exercise the
border conditions, as well as non-SB aligned sizes.

Change-Id: Ie7c2b7860ac3727e23202042f2e86792652912f8

These files can stand in until we get proper syntax vectors. They
should provide some additional assurance against inadvertant
bitstream changes.

Change-Id: I12f6c9a5f054e30df40a7ff1f33145abf7e1d59d

This avoids encoding tokens for blocks that are entirely
in the UMV border. This changes the bitstream.

Change-Id: I32b4df46ac8a990d0c37cee92fd34f8ddd4fb6c9

Got 61 test vectors from vp8-test-vectors.git
(http://git.chromium.org/gitweb/?p=webm/vp8-test-vectors.git)

Added decoder test vectors downloading in unit tests. Uploaded
the test vectors and their md5 files to WebM website.
  $ gsutil cp *.* gs://downloads.webmproject.org/test_data/libvpx

Added their sha1sum to the test/test-data.sha1 file.

In unit tests, download the test vectors to LIBVPX_TEST_DATA_PATH.

Test_vector_test goes through the test vectors, decodes them, and
compute the md5 checksums. The checksums are compared with the
expected md5 checksums to tell if the decoder decodes correctly.

Change-Id: Ia1e84f9347ddf1d4a02e056c0fee7d28dccfae15

Also fix unit testing.

Change-Id: Iacdc6f1ec53388e093cda1c13e4379e83d4a6535

To do so we add a framework for encoding a yv12 file..

Change-Id: I94a061eb916beaf6cde920cf1aaadb6eed10a717