Upgrade GLPK to 4.52.

In addition, make tests separately for easier inspection.
New formula for IPOPT.
New formula for CppAD.
Update MUMPS formula for Mavericks.
Merge pull request #489 from dpo/mumps

Update MUMPS formula for Mavericks.
New formula for ASL.

ASL is the AMPL Solver Library and allows optimization solvers to
interact with models written in the AMPL modeling language
(www.ampl.com), one of the most common modeling languages used in the
optimization community.
Merge pull request #393 from dpo/asl

New formula for ASL.
Merge pull request #416 from dpo/ipopt

New formula for IPOPT.
Merge pull request #440 from dpo/cppad

New formula for CppAD.
Merge pull request #399 from dpo/glpk

Upgrade GLPK to 4.52.
armadillo: added C++11 mode support
hdf5: added C++11 mode support
opencv: added C++11 mode support and version bump
VTK6: Added C++11 mode support with several optional dependencies.
ITK: Added C++11 mode support with several optional dependencies.