port TComLoopFilter Functions into /common/deblock

1. Rename TComLoopFilter to Deblock
2. Remove hungarian notation function names and variables
3. Remove unused or empty functions

--HG--
extra : amend_source : b4100646d85e793976aec86642324f9042046999
rc: add cli options for multi-pass rate control

--HG--
extra : amend_source : e89b3a74d8431629e9bead5d79389a0101207a87
cli: reorder argument help for clarity, add more sections

--HG--
extra : amend_source : ef64e01554906a92e2a9bce0e708f2c6396a34e4