- Everyone who has contributed code to the project has been asked to license
their contributions under LPGL and they have agreed.
- COPYING file changed to say LGPLv2.1 instead of GPLv2.
- GPL changed to LGPL in the header of every single file that a header and
header added to the few that were missing one.
- Also.. Happy new year!
- Add encoder_state->global->cur_lambda_cost_sqrt.
- Use sqrt lambda for inter search and rough intra search.
- The effect on inter is around 10-20% bdrate. The effect on intra is smaller
and non-existent when --rd=2 is enabled, as the intra search refinement was
already done with SSD and correct lambda.
- It's good that this module has been chopped to smaller pieces, but lets
avoid including .c files unless we really have to. These make pretty good
submodules on their own so just make them their own compilation units.
- Move some stuff around to avoid having to forward declare them
in encoderstate.c.
