Add libm to libdaalabase.
Implement daala_setup_free().
Fix unused variable warning and remove commented code.
Turn off WARN_ON_UNDOCUMENTED.

Newer doxygen (1.8.3.1) has broken this so that it falsely triggers on many
inane things like defines.
Change free() to _ogg_free().
Move the quantization scale into the encoder context.
Add an OD_SUCCESS return code.
Add an OD_SET_QUANT ctl and call it from encoder_example.

I didn't update the allowed range or default value, so this is
different in using the theora default of 48 instead of
the previous default value of '10' from the daala code..
Use decent quantization scale
added motion vectors
Merge branch 'master' into bbritain