Add glossary help page:

Squashed commit of the following:

commit d970c01f9acdcff184c544c7cacb84f0de7c8854
Author: Alex Eng <aeng@redhat.com>
Date:   Thu Aug 28 13:25:57 2014 +1000

    Rename permission to permissions

commit 73ec3adf16ab01662b1869afabc16dfaabba6b7e
Author: Alex Eng <aeng@redhat.com>
Date:   Thu Aug 28 13:06:58 2014 +1000

    change role name to match server configuration

commit e48486bbf805d119ea57cdd3852f1649e2cd6dc4
Author: Alex Eng <aeng@redhat.com>
Date:   Thu Aug 28 12:43:55 2014 +1000

    Add glossary help page