sao: minor cleanups, no behavior change
sao: move frame/slice initialization into SAO::startSlice
Analysis: compressIntraCU clean up
analysis: modified compressInterCU_rd5_6() with CU-specific information
nits
api: remove include of frameencoder
pull search class into encoder/ (TLibEncoder is no more)

TEncSearch -> Search
use consistent comment style and argument lists
make destructor no longer virtual (no more vtable)
moving StatisticLog into x265 namespace came for free
search: remove m_qtTempTrIdx
search: remove some redundant work from estIntraPredQT