Add support for Exiv2 library and utility to manage image metadata
Exiv2 can be built in GPLv2+ or commercial version. But in commercial
version the Nikon lens name database and the NLS support has to be
disabled for copyright reason.
[Thomas:
- switch to using the CMake build system, which works better than the
clunky autoconf + manual Makefile based build system.
- add missing toolchains dependencies: does not build in static
library configuration, needs C++, etc.]
Signed-off-by: Nicolas Serafini <nicolas.serafini@sensefly.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
