Hard math to fix issue #571. Well, not really hard math, just checking if vector is in opposite direction and trait that as a special case when removing rope dividing point (this could only happens when rope sticks to land outline, so this basically fixes a bug in another bug).

if(WIN32 AND NOT UNIX)
    file(GLOB DLLs *.dll)
    file(GLOB ICOs *.ico)

    install(FILES
        ${DLLs}
        ${ICOs}
        DESTINATION ${target_library_install_dir})
endif(WIN32 AND NOT UNIX)