Added HUD widgets, make Boot and Close use button_up instead of button_down

lib/hud/widgets/radar.rb

@@ -0,0 +1,28 @@
+class IMICFPS
+  class HUD
+    class RadarWidget < HUD::Widget
+      def setup
+        @size = 256
+        @color = Gosu::Color.new(0x88222222)
+
+        @text = Text.new("RADAR")
+      end
+
+      def draw
+        Gosu.draw_rect(
+          @margin, window.height - (@size + @margin),
+          @size, @size,
+          @color
+        )
+
+        @text.draw
+      end
+
+      def update
+        @text.text = "RADAR: X #{@player.position.x.round(1)} Y #{@player.position.z.round(1)}"
+        @text.x = @margin + @size / 2 - @text.width / 2
+        @text.y = window.height - (@margin + @size)
+      end
+    end
+  end
+end