added sens to config
changed run.m's output

adjusted interactive input
removed the "cursory diagnostics"
added lots of parameters in sensitivity analysis
major reconfiguration: defaults and configuration

python script writes the default interactive script.
that script is called by the front-end script.
all defaults are read from sens.cfg.
the interactive script can be rewritten, however.
added a version of default interactive
reorganized configuration file

now organized in more sensible categories