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