param: initialise lossless/cu-lossless fields to zero

--HG--
branch : stable
rest: correct documentation on AQ

--HG--
branch : stable
cli: seperate new lossless options, make --lossless description more concise

try to avoid having the --lossless line wrap

--HG--
branch : stable
xp: avoid compiler warning from GCC-MinGW

MSVC gives a warning at link time if this file is empty, so I added a useless
variable to the file. GCC-MinGW issues a compile time warning about this
unused variable.

--HG--
branch : stable
qp: remove Encoder::m_useLossless.

This patch removes confusion between Encoder::m_useLossless and x265_param::bUseLossless.
m_useLossless was set whenever qp = 0, and used in TComSPS. qp = 0  is still a valid
encoder option.

--HG--
branch : stable
lossless: disable rate control, force QP=4

strangely enough, using QP=4 gives better lambda for lossless ME and RD
decisions

--HG--
branch : stable
lossless: report compression ratio, disable distortion metrics

--HG--
branch : stable
lossless: do not allow CQP to adjust QP for I/B when encoding lossless

--HG--
branch : stable
param: only log psy-rd if it is enabled

--HG--
branch : stable
Added tag 1.1 for changeset ae9609aeebdc

--HG--
branch : stable