cmake: detect mercurial source installs on Windows, fixes #56

--HG--
extra : amend_source : 8e6260d6bdfecd1600d0c1720a367dc65ff039d9
aq: fine tune aq logic to distribute bits even better
TComTrQuant: nits
noise reduction ported from x264

--HG--
extra : amend_source : ca08db858c123a535645274b0eefddabaf1138e5
TComRom.h, removed unused tables
move TComRdCost.h to encoder/rdcost.h, cleanup refactor

The RDCost class has no resemblance to the original TComRdCost class.

--HG--
rename : source/Lib/TLibCommon/TComRdCost.h => source/encoder/rdcost.h
cmake: merge TLibCommon source groups
lowres: use a better name for cuTree offset buffer
frameencoder: fixup comment following variable rename
cmake: re-enable wd4800 for TLibCommon, fix remaining warnings

--HG--
extra : amend_source : 5bb42c0dde7a937c805cf0e755cc4647ea4a6ae3
cmake: re-enable wd4244 and wd4127 in common/vec
cmake: further cleanups
cmake: re-enable wd4800 for TLibEncoder