Add GRINS Autoconf macro
Anitoch is really header only as of 0.0.8
libMesh Autoconf macro
First stub of helper class for the Physics
First draft of PlanetPhysics

Still need to add mass_residual terms but the steady residual is there.
Relies on the helper class to compute the ugly quantities. API for that
will change.
Start looking for GRINS
Add GRINS to the build system.
Leaner STAMPED_FILES
Start building stubs for GRINS interface.
Merge pull request #1 from pbauman/grins_init

Initial GRINS INterface