veclibfort: update to 0.4.2

vecLibFort now works with Leopard, even PPC Leopard. This has been accomplished without breaking compatibility with newer versions of OSX.

Closes #1232.
opencv: fix CUDA support

Closes #1228.
Closes #970.
Fixes #1182.
mrbayes: comment out ENV setting with mpi

open-mpi has been updated to 1.8, which doesn't use llvm-gcc to do
compiling the comment about the hang doesn't apply anymore.

Closes #1226.
add opencv3 as devel