Added DLL exporting
Added the header necessary for that DLL exporting...
CMakeLists commands are lowercase
else and endif constructs are empty
Install headers into a kar directory
Export overloaded operators
Renamed 'export.h' to 'compat.hpp'
List headers in 'add_library' command
Renamed 'compat.hpp' to 'kar_compat.hpp'
Renamed kar_compat.hpp back to compat.hpp