Building igl statically and moving to the dep scripts

Fixing dep build script on Windows and removing some warnings.

Use bundled igl by default.

Not building with the dependency scripts if not explicitly stated. This way, it will stay in
Fix the libigl patch to include C source files in header only mode.

src/libigl/igl/normalize_row_lengths.h

@@ -0,0 +1,37 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public License 
+// v. 2.0. If a copy of the MPL was not distributed with this file, You can 
+// obtain one at http://mozilla.org/MPL/2.0/.
+#ifndef IGL_NORMALIZE_ROW_LENGTHS_H
+#define IGL_NORMALIZE_ROW_LENGTHS_H
+#include "igl_inline.h"
+#include <Eigen/Core>
+
+// History:
+// March 24, 2012: Alec changed function name from normalize_rows to
+//   normalize_row_lengths to avoid confusion with normalize_row_sums
+
+namespace igl
+{
+  // Obsolete: just use A.rowwise().normalize() or B=A.rowwise().normalized();
+  //
+  // Normalize the rows in A so that their lengths are each 1 and place the new
+  // entries in B
+  // Inputs:
+  //   A  #rows by k input matrix
+  // Outputs:
+  //   B  #rows by k input matrix, can be the same as A
+  template <typename DerivedV>
+  IGL_INLINE void normalize_row_lengths(
+   const Eigen::PlainObjectBase<DerivedV>& A,
+   Eigen::PlainObjectBase<DerivedV> & B);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "normalize_row_lengths.cpp"
+#endif
+
+#endif