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/opengl/glfw/map_texture.h

@@ -0,0 +1,63 @@
+#ifndef IGL_OPENGL_GLFW_MAP_TEXTURE_H
+#define IGL_OPENGL_GLFW_MAP_TEXTURE_H
+
+#ifdef IGL_OPENGL_4
+
+#include "../../igl_inline.h"
+#include <Eigen/Core>
+#include <vector>
+
+namespace igl
+{
+  namespace opengl
+  {
+    namespace glfw
+    {
+      // Given a mesh (V,F) in [0,1]² and new positions (U) and a texture image
+      // (in_data), _render_ a new image (out_data) of the same size.
+      // Inputs:
+      //   V  #V by 2 list of undeformed mesh vertex positions (matching texture)
+      //   F  #F by 3 list of mesh triangle indices into V
+      //   U  #U by 2 list of deformed vertex positions
+      //   in_data  w*h*nc array of color values, channels, then columns, then
+      //     rows (e.g., what stbi_image returns and expects)
+      //   w  width
+      //   h  height
+      //   nc  number of channels
+      // Outputs:
+      //   out_data  h*w*nc list of output colors in same order as input
+      //
+      template <typename DerivedV, typename DerivedF, typename DerivedU>
+      IGL_INLINE bool map_texture(
+        const Eigen::MatrixBase<DerivedV> & V,
+        const Eigen::MatrixBase<DerivedF> & F,
+        const Eigen::MatrixBase<DerivedU> & U,
+        const unsigned char * in_data,
+        const int w,
+        const int h,
+        const int nc,
+        std::vector<unsigned char> & out_data);
+      template <typename DerivedV, typename DerivedF, typename DerivedU>
+      IGL_INLINE bool map_texture(
+        const Eigen::MatrixBase<DerivedV> & _V,
+        const Eigen::MatrixBase<DerivedF> & _F,
+        const Eigen::MatrixBase<DerivedU> & _U,
+        const unsigned char * in_data,
+        const int w,
+        const int h,
+        const int nc,
+        std::vector<unsigned char> & out_data,
+        int & out_w,
+        int & out_h,
+        int & out_nc);
+    }
+  }
+}
+
+#ifndef IGL_STATIC_LIBRARY
+#  include "map_texture.cpp"
+#endif
+
+#endif // IGL_OPENGL_4
+
+#endif