Update cli_getCopyrightInfo.sh:
    
        - Stop retriving copyright year and copyright holder from
          copyright.txt files.
    
        - Stop using the `All rights reserved' string from copyright
          holder. I don't feel very clear right now about the legal impact
          of such sentence. Instead, I took copyright holder from CentOS
          5.5 release notes as reference
          (/usr/share/doc/centos-release-notes-5.5/RELEASE-NOTES-en.html)
          just as it was made public by the project.
          
        - The copyright year is produced using `date +%Y' command. This
          way, the copyright year information will be updated each time
          you produce content with centos-art.