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/embree/shape_diameter_function.h

@@ -0,0 +1,60 @@
+// 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_EMBREE_SHAPE_DIAMETER_FUNCTION_H
+#define IGL_EMBREE_SHAPE_DIAMETER_FUNCTION_H
+#include "../igl_inline.h"
+#include <Eigen/Core>
+namespace igl
+{
+  namespace embree
+  {
+    // Forward define
+    class EmbreeIntersector;
+    // Compute shape diamter function per given point
+    //
+    // Inputs:
+    //    ei  EmbreeIntersector containing (V,F)
+    //    P  #P by 3 list of origin points
+    //    N  #P by 3 list of origin normals
+    // Outputs:
+    //    S  #P list of shape diamater function values between bounding box
+    //    diagonal (perfect sphere) and 0 (perfect needle hook)
+    //
+    template <
+      typename DerivedP,
+      typename DerivedN,
+      typename DerivedS >
+    IGL_INLINE void shape_diameter_function(
+      const EmbreeIntersector & ei,
+      const Eigen::PlainObjectBase<DerivedP> & P,
+      const Eigen::PlainObjectBase<DerivedN> & N,
+      const int num_samples,
+      Eigen::PlainObjectBase<DerivedS> & S);
+    // Wrapper which builds new EmbreeIntersector for (V,F). That's expensive so
+    // avoid this if repeatedly calling.
+    template <
+      typename DerivedV,
+      typename DerivedF,
+      typename DerivedP,
+      typename DerivedN,
+      typename DerivedS >
+    IGL_INLINE void shape_diameter_function(
+      const Eigen::PlainObjectBase<DerivedV> & V,
+      const Eigen::PlainObjectBase<DerivedF> & F,
+      const Eigen::PlainObjectBase<DerivedP> & P,
+      const Eigen::PlainObjectBase<DerivedN> & N,
+      const int num_samples,
+      Eigen::PlainObjectBase<DerivedS> & S);
+  }
+};
+#ifndef IGL_STATIC_LIBRARY
+#  include "shape_diameter_function.cpp"
+#endif
+
+#endif
+