* Do not try to set usetex=False or resave
if savefig fails. Instead just return error msg.

* Replace check_call with check_out in sh()
Allows collection of outputs.
Added redirect_error arg so stderr can be
redirected to stdout and user in error logging.

* Collect stderr msgs from lastal for use in
informative logging.

* Log suggestion to use --notex if savefig fails