Use templated argument as type of macroblock
InterFrame header
Rename macroblock_header -> macroblock (WIP)
Preliminary support for interframe macroblocks
Remove -Wno-unused-function (now that dixie code is gone)
Add intra values to mbmode / bmode enumerations
Coded Block now captures all context
Blocks no longer need to know how to decode their prediction mode
Start decoding inter macroblock fields
Try to decode interframes
Decode intra prediction modes in an interframe
Refactor decoder state and updates
Track quantizers and y/uv intra-in-inter probabilities
Track loop filter segment updates in intra frames
Intra-in-inter b_mode probabilities don't vary
Rename "default" b-mode probs to "invariant" since they never change
decoder.cc: cleanup
block.hh: get rid of unnecessary includes
block.hh: coded() is only a question for Y2 blocks
Add motion vectors to block and macroblock