Add CopyConstructor for Tiles as requested in #154.

src/de/gurkenlabs/litiengine/environment/tilemap/xml/MapImage.java

@@ -52,16 +52,16 @@ public MapImage(MapImage original) {
       return;
     }
 
-    this.source = original.source;
-    if (original.transparentcolor != null) {
-      this.transparentcolor = new Color(original.transparentcolor.getRed(),
-          original.transparentcolor.getGreen(),
-          original.transparentcolor.getBlue(),
-          original.transparentcolor.getAlpha());
+    this.source = original.getSource();
+    if (original.getTransparentColor() != null) {
+      this.transparentcolor = new Color(original.getTransparentColor().getRed(),
+          original.getTransparentColor().getGreen(),
+          original.getTransparentColor().getBlue(),
+          original.getTransparentColor().getAlpha());
     }
-    this.width = original.width;
-    this.height = original.height;
-    this.absolutePath = original.absolutePath;
+    this.width = original.getWidth();
+    this.height = original.getHeight();
+    this.absolutePath = original.getAbsoluteSourcePath();
   }
 
   @Override

src/de/gurkenlabs/litiengine/environment/tilemap/xml/Tile.java

@@ -43,6 +43,21 @@ public class Tile extends CustomPropertyProvider implements ITile {
   public Tile() {
   }
 
+  /**
+   * Instantiates a new {@code Tile} instance with the same attributes as a given {@code Tile}.
+   * 
+   * @param original
+   */
+  public Tile(Tile original) {
+    this.flipped = original.isFlipped();
+    this.flippedDiagonally = original.isFlippedDiagonally();
+    this.flippedHorizontally = original.isFlippedHorizontally();
+    this.flippedVertically = original.isFlippedVertically();
+    this.tilesetEntry = original.getTilesetEntry();
+    this.gid = original.getGridId();
+    this.tileCoordinate = original.getTileCoordinate();
+  }
+
   /**
    * Instantiates a new {@code Tile} instance.
    *