Move demo certificate Makefile + scripts into /usr/share/doc
    
    These scripts have existed for a long time; the history dates past
    the import from CVS.
    
    Since then, a lot has changed; probably most notably is the existence
    of [Let's Encrypt](https://letsencrypt.org).  For private/internal
    use cases, there are tons of other tools, such as
    [Dogtag](http://pki.fedoraproject.org/wiki/PKI_Main_Page)
    etc.
    
    The `Makefile` introduces a dependency on `make` which is embarrassing
    to include in Fedora Atomic Host by default (and particularly now
    that GNU Make pulls in guile).  For a bit of background on the `make`
    dependency, see: [RH bugzilla #783446](https://bugzilla.redhat.com/show_bug.cgi?id=783446)
    
    These scripts were never portable across distributions, so while I'm sure there
    are some people out there using them, it's really time to basically deprecate
    them and point people at more serious replacements. This is the first step in
    that, by moving them into /usr/share/doc.