Added sprite and better vertex format. works, but now I lost texturing

src/vertex_2d.rs

@@ -0,0 +1,13 @@
+
+#[derive(Default, Debug, Clone)]
+pub struct Vertex2D {
+    pub position: [f32; 2]
+}
+
+#[derive(Default, Debug, Clone)]
+pub struct ColoredVertex2D {
+    pub position: [f32; 2],
+    pub color   : [f32; 4],
+}
+
+vulkano::impl_vertex!(ColoredVertex2D, position, color);