new battery model with shaders

Shaders/battery_button.gdshader

@@ -0,0 +1,15 @@
+shader_type spatial;
+
+void vertex() {
+	// Called for every vertex the material is visible on.
+}
+
+void fragment() {
+	ALBEDO = vec3(1.0,0.0,0.0);
+	EMISSION = vec3(1.0,0.0,0.0);
+}
+
+//void light() {
+//	// Called for every pixel for every light affecting the material.
+//	// Uncomment to replace the default light processing function with this one.
+//}