Update `repository-init.pl' texinfo templates used by the help
    functionality of centos-art.sh script.
    
        - Add `return 1;' at the end of initialization file. This let us
          have an empty file as initialization file. That is required for
          en_US/repository-init.pl. At this moment there is no English
          specific initialization and the file must be there for
          consistency with other language specific manuals. 
          
        - Providing a condition inside centos-art.sh script to treat
          English documentation manual different from other documentation
          manuals looks not so good. Using a consistent template
          file/directory structure to handle all documentation manuals
          equally seems to be better (just a personal feeling).