reindent & wrap to 80 char parameterized_model.cpp
parameter file handling changes in parameterized_model.cpp

Rework parameter file name handling to avoid use of unsafe tmpnam()
function.  Now use mkstemp.

Also, do a better job of deallocating memory upon failures.

Also, pass the model_driver_init() function a *copy* of the parameter
file names so that if they are changed, we still have the original file
name strings for use when deleting the temporary files.