Tweak sc_mpi.m4
Taking out SC_CUDA for the time being
One bug and some tweaks to sc_lapack.m4
Check long long byte sizes
Activate simplifed blas/lapack tests
Move blas/lapack configuration into a macro
White space
Test link blas without and with FLIBS
Test link lapack without and with (BLAS_)FLIBS
Directly add fortran libraries to LIBS