Pushed missing files

Started adding Replay Editor using johni0702's excellent ReplayStudio Library
Added fully functional GuiDropdown GUI Element (useable in other projects as well)

src/main/java/eu/crushedpixel/replaymod/utils/MouseUtils.java

@@ -0,0 +1,32 @@
+package eu.crushedpixel.replaymod.utils;
+
+import java.awt.Point;
+
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.gui.ScaledResolution;
+
+import org.lwjgl.input.Mouse;
+
+public class MouseUtils {
+
+	private static final Minecraft mc = Minecraft.getMinecraft();
+	
+	public static Point getMousePos() {
+		Point scaled = getScaledDimensions();
+		int width = (int)scaled.getX();
+		int height = (int)scaled.getY();
+
+		final int mouseX = (Mouse.getX() * width / mc.displayWidth);
+		final int mouseY = (height - Mouse.getY() * height / mc.displayHeight);
+		
+		return new Point(mouseX, mouseY);
+	}
+	
+	public static Point getScaledDimensions() {
+		ScaledResolution sr = new ScaledResolution(mc, mc.displayWidth, mc.displayHeight);
+		final int width = sr.getScaledWidth();
+		final int heigth = sr.getScaledHeight();
+		
+		return new Point(width, heigth);
+	}
+}