suzerain: add suzerain_bl_local.y

Want to do this to remove the thickness requirement
for the new baseflow_compute_reynolds.

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@42915 0bd85f0b-c151-43b9-a1e9-27231104551f
suzerain: move baseflow to end of file

This is confusing to be stuffed in the middle of the file.

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@42916 0bd85f0b-c151-43b9-a1e9-27231104551f