Upgrade CentOS 6.4 templates to 6.5 templates.
Migrate ks.cfgs for RHEL to centos-6.5. Also correct box naming.
Convert RHEL templates to use a user-configurable mirror. Since the URLs in there are bogus, this is the only way a user can build these boxes after hosting the ISOs on his/her own server.
Added Travis badge, fix URL to test-kitchen