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/edge_flaps.cpp

@@ -0,0 +1,60 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2015 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/.
+#include "edge_flaps.h"
+#include "unique_edge_map.h"
+#include <vector>
+#include <cassert>
+
+IGL_INLINE void igl::edge_flaps(
+  const Eigen::MatrixXi & F,
+  const Eigen::MatrixXi & E,
+  const Eigen::VectorXi & EMAP,
+  Eigen::MatrixXi & EF,
+  Eigen::MatrixXi & EI)
+{
+  // Initialize to boundary value
+  EF.setConstant(E.rows(),2,-1);
+  EI.setConstant(E.rows(),2,-1);
+  // loop over all faces
+  for(int f = 0;f<F.rows();f++)
+  {
+    // loop over edges across from corners
+    for(int v = 0;v<3;v++)
+    {
+      // get edge id
+      const int e = EMAP(v*F.rows()+f);
+      // See if this is left or right flap w.r.t. edge orientation
+      if( F(f,(v+1)%3) == E(e,0) && F(f,(v+2)%3) == E(e,1))
+      {
+        EF(e,0) = f;
+        EI(e,0) = v;
+      }else
+      {
+        assert(F(f,(v+1)%3) == E(e,1) && F(f,(v+2)%3) == E(e,0));
+        EF(e,1) = f;
+        EI(e,1) = v;
+      }
+    }
+  }
+}
+
+IGL_INLINE void igl::edge_flaps(
+  const Eigen::MatrixXi & F,
+  Eigen::MatrixXi & E,
+  Eigen::VectorXi & EMAP,
+  Eigen::MatrixXi & EF,
+  Eigen::MatrixXi & EI)
+{
+  Eigen::MatrixXi allE;
+  std::vector<std::vector<int> > uE2E;
+  igl::unique_edge_map(F,allE,E,EMAP,uE2E);
+  // Const-ify to call overload
+  const auto & cE = E;
+  const auto & cEMAP = EMAP;
+  return edge_flaps(F,cE,cEMAP,EF,EI);
+}