Add documentation for fabric methods

Include everybody in deploy
fab up must be serial

Too much hassle to work out the parallel deployment without rerunning
the packing.  Just coulnd't get it to work.  Attack _needs_ to be
parallel, but making "up" parallel is just a nicety that doesn't have to
land today.
swarm: basic support for running the subscriber on a target too
swarm: add basic documentation on using the fab files
Allow both time tracking and variable message sizes

Fixes github issue #12