Revert "Updated ansible.spec should now work for CentOS 5 and CentOS 6"

make rpm did not work on Fedora 18
This reverts commit ea39454f98f43d5a19d07b4d0110ca0c6fc518be.

Conflicts:
	packaging/rpm/ansible.spec
ansible.spec: update Source0 & Url

The source archive is "tar.gz", not "tar.bz2".
The new home is http://ansible.cc