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/unique.h

@@ -0,0 +1,58 @@
+// 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_UNIQUE_H
+#define IGL_UNIQUE_H
+#include "igl_inline.h"
+
+#include <vector>
+#include <Eigen/Core>
+namespace igl
+{
+  // Act like matlab's [C,IA,IC] = unique(X)
+  //
+  // Templates:
+  //   T  comparable type T
+  // Inputs:
+  //   A  #A vector of type T
+  // Outputs:
+  //   C  #C vector of unique entries in A
+  //   IA  #C index vector so that C = A(IA);
+  //   IC  #A index vector so that A = C(IC);
+  template <typename T>
+  IGL_INLINE void unique(
+    const std::vector<T> & A,
+    std::vector<T> & C,
+    std::vector<size_t> & IA,
+    std::vector<size_t> & IC);
+  template <typename T>
+  IGL_INLINE void unique(
+    const std::vector<T> & A,
+    std::vector<T> & C);
+  template <
+    typename DerivedA,
+    typename DerivedC,
+    typename DerivedIA,
+    typename DerivedIC>
+  IGL_INLINE void unique(
+      const Eigen::DenseBase<DerivedA> & A,
+      Eigen::PlainObjectBase<DerivedC> & C,
+      Eigen::PlainObjectBase<DerivedIA> & IA,
+      Eigen::PlainObjectBase<DerivedIC> & IC);
+  template <
+    typename DerivedA,
+    typename DerivedC>
+  IGL_INLINE void unique(
+      const Eigen::DenseBase<DerivedA> & A,
+      Eigen::PlainObjectBase<DerivedC> & C);
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "unique.cpp"
+#endif
+
+#endif