Make the script that generates the Makefile.am files use "ln -s -f".

See also 64194159aecac1177eb615520a64a0eabf6c568d.
Add initial support for Gauss-Lobatto quadrature.

Refs #350.
Updating Makefile.am's
Ran bootstrap.
Add unit test for Gauss-Lobatto quadrature.
Add an enum-to-string conversion for QGAUSS_LOBATTO.
Add unit test for enum_to_string conversion for QuadratureTypes.
Adding Gauss-Lobatto quadrature rules up to 43rd order.

Points/weights copied from: http://keisan.casio.com/exec/system/1280801905

Refs #350.
Adding unit tests for Gauss-Lobatto quadrature rules up to 43rd-order.

I tested all rules up to 43rd-order during development, but we only
test up to 9th-order during 'make check' since the higher-order rules
are really expensive in 3D (23^3=12167 points for a single Hex).
Merge pull request #351 from libMesh/gauss_lobatto

Add Gauss-Lobatto quadrature rules up to 43rd-order