Added gfortran dependency for LSB/lsbcc.
Use FC instead of CC to link the dynamic library on OS X

Avoids problems of libgfortran not being found.
Merge pull request #311 from loladiro/patch-1

Use FC instead of CC to link the dynamic library on OS X
refs #287. Don't enable OpenMP for netlib LAPACK sequential Fortran codes.
Fixed #315. Added OPENBLAS_ prefix to openblas_config.h.
Refs #309. Fixed trtri_U single thread computational bug.
Refs #314. Fixed clang compiling bug on OSX.
Avoid argument list too long issue in make clean.
Refs #307. Fixed the hang bug when free OpenBLAS dll in Windows.
Refs #283. Fixed the incorrect usage of long data type for Windows 64.
Merge remote branch 'origin/develop' into piledriver