Fix 'term' action binding and defaults.

Fix 'term' action binding and defaults.
Note that 'program[term]' should be used to set the terminal; not
spawn_term.

Prevent width options from being set to negative values.

Change conf autorun example to xombrero.

Improve readability of enums.
(Based on patch submitted by Jason Woofenden <jason@jasonwoof.com>)

Sort conf_load switch cases to match enum.

ok marco