Adding PYRAMID14 support in miscellaneous places:
* string_to_enum()
* Various functions in fe_lagrange.C
* Quadrature initialization routines
* FEAbstract::on_reference_element()
* lagrange_nodal_soln() helper function
* FEAbstract::get_refspace_nodes()
* FEInterface::max_order()
* l2_lagrange_n_dofs()
* monomial_n_dofs()
* xyz_n_dofs()
* Quality::valid()
* ElementTypes::basic_name()
* ElementTypes::name()
* QGrid::init_3D()

Not sure that I've found all of them, but these were enough
to allow me to use the PYRAMID14 in a simple finite element
calculation.
Adding one_pyramid14.xda reference element file.

Regenerated the reference_elem.data file.

Adding Pyramid14 to the ReferenceElem::get() stuff.

Maple script for verifying basis functions and computing
first and second derivatives can be found here:

https://gist.github.com/jwpeterson/7819000