Windows

copy zlib.lib to zdll.lib for Qt to find it
same for png and ext_tiff

copy Half.dll from lib to bin; openexr still cannot find ilmbase

exiv2: currently tzname hacked out, should be be #define tzname _tzname

todo: libssh, libcurl, libgsl

boost_system needs to be renamed to plain boost_system.lib

cl errors out during cmake phase

need to add png2ico, icons, mimeinfo, translations

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3rdparty deps:

poppler: doesn't build with msvc 2015 bevause of compiler compatibility issues
