fix :  square chroma transform expected error message
help: removing the default QP value in the help message

Since CQP is not the default rate control mode, a default QP confuses readers.
param: initialise crf-max and crf-min values in the param structure.
param: tabs to spaces
asm: fix bug for invalid read in sa8d

fix invalid read when different stride value given for two input buffer and
enabled 16x16 and 8x8 sa8d primitives.
rest: update fastdecode to mention no intra in B
xp: hack to avoid linker warnings
param: fix check of minimum picture dimensions
TComTrQuant: nits
psy: mention the fact that psy-rd requires rdo
cmake: detect mercurial source installs on Windows, fixes #56
aq: fine tune aq logic to distribute bits even better
TComTrQuant: nits
noise reduction ported from x264
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.
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