Updating LICENSE to Roy and I.
Headers updated with new LICENSE
dirichlet_fem run with updated libMesh/fparser
Merge pull request #132 from grinsfem/new_dirichlet_fem

dirichlet_fem run with updated libMesh/fparser
Merge pull request #128 from pbauman/license_update

License update
Antioch now uses kg/mol for molor mass.
Updated kinetics regression for Antioch.

This is because of the slight change for the universal gas constant
conversion to calories (see discussion in #24).