Various improvements to debug library.

    o Modularize debug output systems and add functionality to log to the syslog and new systemd journal (-o :syslog and -o :journal).
    o Add D_FATAL, D_ERROR, D_INFO.
    o debug_config_file now determines the absolute path so the program may safely chdir.
    o Parrot debug messages for children now show the child pid explicitly:
        On syslog or systemd journal:
            Mar 20 21:04:55.812447 neverwinter parrot_run[15063]: <child:15064> local: write 7 0x0x7fd7a03b6000 65 16
        On regular file:
            2014/03/20 21:58:28.46 parrot_run[26162] <child:26163> local: write 7 0x0x7f2a8f02f000 10 334
    o Allow chirp_tool to log to a file.
    o On fatal(...), dump core via SIGQUIT.
    o Move WQ hack of renaming the debug file to debug.[ch] as debug_rename.