IPStack: Remove another ciao-dependency. We use the operating_system_integration directory inside libipstack/src instead of libipstack/src/as. Change #include path of cfAttribs.h. This file is now generated in the build directory.
determine_relevant_files: Output definitions as #define's now instead of compiler -D flags. Improve argument handling. If no -d is set, we do not output definitions at all. If no -o is set, we do not output relevant files