Added a copy of CBLAS so we can use it when linking against a BLAS that

doesn't have it.

dlib/external/cblas/cblas_dzasum.c

+/*
+ * cblas_dzasum.c
+ *
+ * The program is a C interface to dzasum.
+ * It calls the fortran wrapper before calling dzasum.
+ *
+ * Written by Keita Teranishi.  2/11/1998
+ *
+ */
+#include "cblas.h"
+#include "cblas_f77.h"
+double cblas_dzasum( const int N, const void *X, const int incX) 
+{
+   double asum;
+#ifdef F77_INT
+   F77_INT F77_N=N, F77_incX=incX;
+#else 
+   #define F77_N N
+   #define F77_incX incX
+#endif
+   F77_dzasum_sub( &F77_N, X, &F77_incX, &asum);
+   return asum;
+}