Internal Libraw updated to 0.18-beta1 with 78 cameras added,

floating point DNG support, decode exotic DNG formats e.g. 8-bit DNG,
and more metadata parsed while decoding as white balance presets,
DNG colordata, vendor specific metadata.

See Libraw announcement for details : http://www.libraw.org/news/libraw-0-18-beta1

CCBUGS: 328321
CCBUGS: 257737
CCBUGS: 347010

BUGS: 368862
BUGS: 367640

FIXED-IN: 5.3.0