Implement #equals() in Point, Size and Rectangle without argument reading.

Closes #235

src/basic/Point.js

@@ -198,8 +198,10 @@ var Point = Base.extend(/** @lends Point# */{
 	 * console.log(point != new Point(1, 1)); // true
 	 */
 	equals: function(point) {
-		point = Point.read(arguments, 0, 0, true); // readNull
-		return point ? this.x == point.x && this.y == point.y : false;
+		return point === this || point && (this.x === point.x
+				&& this.y === point.y
+				|| Array.isArray(point) && this.x === point[0]
+					&& this.y === point[1]) || false;
 	},
 
 	/**

src/basic/Rectangle.js

@@ -201,9 +201,11 @@ var Rectangle = Base.extend(/** @lends Rectangle# */{
 	 * @return {Boolean} {@true if the rectangles are equal}
 	 */
 	equals: function(rect) {
-		rect = Rectangle.read(arguments);
-		return this.x == rect.x && this.y == rect.y
-				&& this.width == rect.width && this.height == rect.height;
+		return rect === this || rect && (this.x === rect.x && this.y === rect.y
+				&& this.width === rect.width && this.height=== rect.height
+				|| Array.isArray(rect) && this.x === rect[0]
+					&& this.y === rect[1] && this.width === rect[2]
+					&& this.height === rect[3]) || false;
 	},
 
 	/**

src/basic/Size.js

@@ -155,8 +155,10 @@ var Size = Base.extend(/** @lends Size# */{
 	 * console.log(size != new Size(1, 1)); // true
 	 */
 	equals: function(size) {
-		size = Size.read(arguments);
-		return this.width == size.width && this.height == size.height;
+		return size === this || size && (this.width === size.width
+				&& this.height === size.height
+				|| Array.isArray(size) && this.width === size[0]
+					&& this.height === size[1]) || false;
 	},
 
 	/**

src/path/Segment.js

@@ -413,7 +413,7 @@ var Segment = Base.extend(/** @lends Segment# */{
 	},
 
 	equals: function(segment) {
-		return segment == this || segment
+		return segment === this || segment
 				&& this._point.equals(segment._point)
 				&& this._handleIn.equals(segment._handleIn)
 				&& this._handleOut.equals(segment._handleOut);