add missing ABI wrappers for blas/lapack for MacOSX Accelerate framework
fix missing blas/lapack ABI wrappers for the iterative solvers for MacOSX Accelerate
fix the blas/lapack ABI wrappers for arpack for MacOSX Accelerate framework
apply ARPACK patches from http://forge.scilab.org/index.php/p/arpack-ng/issues/1259/
enable single precision in ARPACK again