Add support for shadows.

Closes #36.

src/item/Item.js

@@ -2887,8 +2887,7 @@ var Item = Base.extend(Callback, /** @lends Item# */{
 			limit = style.getMiterLimit(),
 			fillColor = style.getFillColor(),
 			strokeColor = style.getStrokeColor(),
-			dashArray = style.getDashArray(),
-			dashOffset = style.getDashOffset();
+			shadowColor = style.getShadowColor();
 		if (width != null)
 			ctx.lineWidth = width;
 		if (join)
@@ -2901,6 +2900,8 @@ var Item = Base.extend(Callback, /** @lends Item# */{
 			ctx.fillStyle = fillColor.toCanvasStyle(ctx);
 		if (strokeColor) {
 			ctx.strokeStyle = strokeColor.toCanvasStyle(ctx);
+			var dashArray = style.getDashArray(),
+				dashOffset = style.getDashOffset();
 			if (paper.support.nativeDash && dashArray && dashArray.length) {
 				if ('setLineDash' in ctx) {
 					ctx.setLineDash(dashArray);
@@ -2911,6 +2912,13 @@ var Item = Base.extend(Callback, /** @lends Item# */{
 				}
 			}
 		}
+		if (shadowColor) {
+			ctx.shadowColor = shadowColor.toCanvasStyle(ctx);
+			ctx.shadowBlur = style.getShadowBlur();
+			var offset = this.getShadowOffset();
+			ctx.shadowOffsetX = offset.x;
+			ctx.shadowOffsetY = offset.y;
+		}
 	},
 
 	// TODO: Implement View into the drawing.

src/style/Style.js

@@ -69,21 +69,26 @@ var Style = Base.extend(new function() {
 	// windingRule / resolution / fillOverprint / strokeOverprint are currently
 	// not supported.
 	var defaults = {
-		// path styles
+		// Paths
 		fillColor: undefined,
 		strokeColor: undefined,
-		selectedColor: undefined,
 		strokeWidth: 1,
 		strokeCap: 'butt',
 		strokeJoin: 'miter',
 		miterLimit: 10,
 		dashOffset: 0,
 		dashArray: [],
-		// character styles
+		// Shadows
+		shadowColor: undefined,
+		shadowBlur: 0,
+		shadowOffset: new Point(),
+		// Selection
+		selectedColor: undefined,
+		// Characters
 		font: 'sans-serif',
 		fontSize: 12,
 		leading: null,
-		// paragraph styles
+		// Paragraphs
 		justification: 'left'
 	};
 
@@ -415,6 +420,48 @@ var Style = Base.extend(new function() {
 	 * circle.fillColor = new Color(1, 0, 0);
 	 */
 
+	/**
+	 * {@grouptitle Shadow Style}
+	 *
+	 * The shadow color.
+	 *
+	 * @property
+	 * @name Style#shadowColor
+	 * @type Color
+	 *
+	 * @example {@paperscript}
+	 * // Setting the shadow color of a path to black:
+	 *
+	 * // Create a circle shaped path at { x: 80, y: 50 }
+	 * // with a radius of 35:
+	 * var circle = new Path.Circle(new Point(80, 50), 35);
+	 *
+	 * // Set the shadow color of the circle to RGB black:
+	 * circle.shadowColor = new Color(0, 0, 0);
+	 *
+	 * // Set the shadow blur, offset to { x: 10, y: 10 }
+	 * circle.shadowBlur = 10;
+	 * circle.shadowOffset = new Poit(10, 10);
+	 */
+
+	/**
+	 * The shadow's blur radius.
+	 *
+	 * @property
+	 * @default 0
+	 * @name Style#shadowBlur
+	 * @type Number
+	 */
+
+	/**
+	 * The shadow's offset.
+	 *
+	 * @property
+	 * @default 0
+	 * @name Style#shadowOffset
+	 * @type Point
+	 */
+
 	/**
 	 * {@grouptitle Selection Style}
 	 *