Ref #285: added axpby kernels
Ref #375: added workaround for small sizes to scal.c and zscal.c
Ref #51: added blas extension domatcopy as not opimized reference
Ref #51: added blas extension somatcopy
Ref #51: added blas extensions zomatcopy and comatcopy
Ref #51: added blas extensions simatcopy, dimatcopy, cimatcopy, zimatcopy
Merge pull request #384 from wernsaar/develop

Blas extensions