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* remove biicode support The company/startup died in 2015 and the open source project seems to be dead as well. * define compiler warning flags globally instead of locally for every binary * add support for cmake's find_package() (refs #52) This rewrite of the main CMakeLists.txt cleans up the way ICU flags are attached to the library target and adds the cmake helper files (cxxopts-config.cmake, cxxopts-config-version.cmake, cxxopts-targets.cmake) which are needed for exporting the cxxopts target. Cmake's find_package command uses these files when the library is consumed by another project. Additionally, two new tests have been added which build the example application via add_subdirectory and find_package. * removed target_sources from interface library Adding target_sources to interface libraries and exporting them is not supported in CMake 3.1 and 3.2. Furthermore, since it is a header, it is not needed at all. * use the *_LDFLAGS instead of *_LIBARIES when linking ICU The LIBRARIES variable seems to contain only the name and not the full path.
