regression.py invoked as follows (trailing carets are line continuation characters)
python regression.py --runner="Sandia-tiger-x86" --bjam-toolset=darwin ^
--pjl-toolset=darwin --toolsets="darwin-4.0.1" --bjam-options="-j4 -l300"
using darwin
: 4.0.1
: /usr/bin/g++
;