Right now only IVF format is supported which is enough for example code.
Other formats like y4m, webm, raw yuv will be supported later.

Change-Id: I34c6f20731c1851947587ca5c589d7856b675164

New API is supposed to be used from example code. Current implementation
only supports IVF containers (will be extended to Y4M).

Change-Id: Ib7da87237690b1a28297bdf03bc41c6836a84b7e

File type check inside ivf_read_frame() is not necessary (it is done
before this function get called).

Change-Id: Iede8feb358d25878b340473d85c3b01d701fc624

Change-Id: Ib8aafeee30d59521ee256dc1801e0db6b4b8a371

- Move IVF reading support into ivfdec.c and ivfdec.h
- Move IVF writing support into ivfenc.c and ivfenc.h
- Removed IVF writing code from the SVC example in favor of ivfenc.

Change-Id: I70adf6240d0320fdd232d8546ed573f0f68dd793

Values of MODE_UPDATE_PROB and VP9_COEF_UPDATE_PROB are equal, so replacing
them with one constant. Inlining appropriate arguments for functions:
  vp9_cond_prob_diff_update (encoder)
  vp9_diff_update_prob (decoder)

Change-Id: I1255a1cb477743b799b3bfbbcd8de6b32b067338

Change-Id: I5ae659c1bfb132428a7272d094b5287d144ec7c8

Change-Id: Idbb2ea80f764fa830fe2ddcfc54ef7fe232f05a8

Change-Id: Ic084c475844b24092a433ab88138cf58af3abbe4

Most of these were picked up by jenkins in the commit that changed
the vp8 namespace to vp9 in common/.

Change-Id: I5cbd56ffc753b92ef805133cda6acc1713a13878

Change-Id: Ic5a5f60e1ff9d9ccae4174160d36529466eeb509

Changes 'The VP8 project' to 'The WebM project', for consistency
with other webmproject.org repositories.

Fixes issue #97.

Change-Id: I37c13ed5fbdb9d334ceef71c6350e9febed9bbba

When the license headers were updated, they accidentally contained
trailing whitespace, so unfortunately we have to touch all the files
again.

Change-Id: I236c05fade06589e417179c0444cb39b09e4200d

Change-Id: Ieebea089095d9073b3a94932791099f614ce120c