draft is that the user will at the end of an experiment run, log into one
of his nodes and perform some analysis which is intended to be repeated at
the end of the next run, and in future instantiations of the template.

A new table called experiment_template_events holds the dynamic events for
the template. Right now I am supporting just program events, but it will be
easy to support arbitrary events later. As an absurd example:

	node6> /usr/local/bin/template_analyze ~/data_analyze arg arg ...

The user is currently responsible for making sure the output goes into a
file in the archive. I plan to make the template_analyze wrapper handle
that automatically later, but for now what you really want is to invoke a
script that encapsulates that, redirecting output to $ARCHIVE (this
variable is installed in the environment template_analyze.

The wrapper script will save the current time, and then run the program.
If the program terminat...