maint: Clean up #includes in liboctave/numeric directory. * build-aux/mk-opts.pl: Change Perl to generate "" around local include libraries rather than <>. Include "lo-math.h" rather than <cmath>. * CollocWt.cc, DAERTFunc.h, DASPK.cc, DASPK.h, DASRT.cc, DASRT.h, DASSL.cc, DASSL.h, DET.h, EIG.cc, EIG.h, LSODE.cc, LSODE.h, ODE.h, ODES.cc, ODESFunc.h, Quad.cc, aepbalance.cc, base-de.h, base-min.h, bsxfun-decl.h, bsxfun-defs.cc, bsxfun.h, chol.cc, eigs-base.cc, fEIG.cc, fEIG.h, gepbalance.cc, gsvd.cc, hess.cc, lo-blas-proto.h, lo-lapack-proto.h, lo-mappers.cc, lo-mappers.h, lo-qrupdate-proto.h, lo-slatec-proto.h, lo-specfun.cc, lo-specfun.h, lu.cc, lu.h, oct-convn.cc, oct-convn.h, oct-fftw.cc, oct-fftw.h, oct-norm.cc, oct-rand.cc, oct-rand.h, oct-spparms.cc, oct-spparms.h, qr.cc, qr.h, qrp.cc, randgamma.cc, randpoisson.cc, schur.cc, schur.h, sparse-chol.cc, sparse-chol.h, sparse-dmsolve.cc, sparse-lu.cc, sparse-lu.h, sparse-qr.cc, sparse-qr.h, svd.cc: Rationalize #includes. Use forward declarations of just classes where possible. Reformat some long lines < 80 characters. Reformat some comments for readabliity. * mx-inlines.cc: Rationalize #includes for this file in liboctave/operators used by many in liboctave/numeric.

--- a/liboctave/numeric/lu.h	Mon May 08 20:58:14 2017 -0700
+++ b/liboctave/numeric/lu.h	Tue May 09 08:46:07 2017 -0700
@@ -26,7 +26,10 @@
 
 #include "octave-config.h"
 
-#include "PermMatrix.h"
+#include "Array.h"
+
+class ColumnVector;
+class PermMatrix;
 
 namespace octave
 {
@@ -91,15 +94,15 @@
 
     protected:
 
-      // The result of getp is passed to other Octave Matrix
-      // fucntions, so we use octave_idx_type.
+      // The result of getp is passed to other Octave Matrix functions,
+      // so we use octave_idx_type.
       Array<octave_idx_type> getp (void) const;
 
       T a_fact;
       T l_fact;
 
-      // This is internal storage that is passed to Fortran, so we
-      // need a Fortran INTEGER.
+      // This is internal storage that is passed to Fortran,
+      // so we need a Fortran INTEGER.
       Array<octave_f77_int_type> ipvt;
     };
   }