[FLOC-983] Aws deployment documentation

Here's a sketch.

I managed to upgrade the kernel on an amazon EC2 Fedora20 machine.

Trouble is that upgrading the kernel, means that you then can't install the standard ZFS.

So you have to install the clusterhq zfs packages.

Stacked on top of #967. Merge that branch first.
It would be nice to recommend a specific one.