deployment: it's alive - initial fully working deploy to checkusum.io staging

This will need to be changed once we get a production server setup.  I
am assuming Debian wheezy, which I believe to be a solid choice.  In theory,
after some very basic setup on the server, one should just need to run
two commands to have a working staging instance:

    $ fab staging hostconfig
    $ fab staging deploy

The steps required before this include:
1) provision server and sort out dns stuff
2) set password for root user
3) create 'humonwiki' user and set password and ssh keys

... and, I think that's about it.  If more is needed, then we know
where to put those changes.