Add `centos-art.conf' file:
- This file contains the default configuration used by
centos-ar.sh.
- People that need to use a different configuration (ie., to put
their working copy in a place different from `~/Projects/CentOS'
directory) can use variable CLI_WRKCOPY in this file to set the
location they prefere.
- Presently it is possible to change the following information:
- Absolute path of the working copy
- Copyright information printed on produced content.
- The branding name used in files.
Other information might be added in the future.