- Use original upstream tarball, prebuilt jars are anyway removed in %%prep
    - Don't overuse macros
    - Added explanation about headers in the C++ subpackage
    - Remove unnecessary Makefile and Makefile.in from %%docs, permissions
        fixed
    - Added doxygen docs for C++ as a -C++-doc subpackage
    - antlr-config moved into the C++ subpackage
    - Removed %%post and %%postun javadoc relicts from JPackage