Detach wgl and win32

src/api/wgl/gl.rs

@@ -0,0 +1,12 @@
+/// WGL bindings
+pub mod wgl {
+    include!(concat!(env!("OUT_DIR"), "/wgl_bindings.rs"));
+}
+
+/// Functions that are not necessarly always available
+pub mod wgl_extra {
+    include!(concat!(env!("OUT_DIR"), "/wgl_extra_bindings.rs"));
+}
+
+#[link(name = "opengl32")]
+extern {}