adding a text rendering option

src/lib.rs

@@ -33,6 +33,9 @@ pub trait AglApi {
     fn paint_cursor(&mut self, coords: Point);
     fn hide_cursor();
     fn show_cursor();
+
+    fn draw_text(&mut self, coords: Point, scale: u8, color: RGBA, text: String);
+
     /// Actually move the double buffer to the single buffer and "update" the screen
     fn draw(&mut self);
     /// Setup the clear color to be used