suzerain: #3058 add gammaw, Pre, Prw data

gamma no longer set per discussion with Bob.
gamma_e and gamma_w output for information
Pr_e and Pr_w output for information
specifying --lower_T permits overriding --cevisslam
specifying --Ma permits overriding --cevisslam
specifying --radialflow_pexi permits overriding --cevisslam

Permit specifying --lower_T to override --cevisslam
temperature ratio.

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@44348 0bd85f0b-c151-43b9-a1e9-27231104551f