Adding new CentOS and Fedora targets to accommodate availability.

Adding new CentOS and Fedora targets to accommodate availability.

Since Fedora and CentOS have different packages available by default,
break out the RPM lists so each can use the common list.

Since last working on this, the EPEL repo (https://fedoraproject.org/wiki/EPEL)
is available as a package within the normal CentOS repositories.

Also add CPAN target for CentOS for packages not available via EPEL
and create targets to install python-simplejson and ejabberd from source.