Fix #fontWeight examples and documentation.

src/style/Style.js

@@ -38,7 +38,7 @@
  * text.content = 'Hello world.';
  * text.style = {
  * 	fontFamily: 'Courier New',
- * 	fontWeight: 'Bold',
+ * 	fontWeight: 'bold',
  * 	fontSize: 20,
  * 	fillColor: 'red',
  * 	justification: 'center'
@@ -544,7 +544,7 @@ var Style = Base.extend(new function() {
 	 *
 	 * @name Style#fontWeight
 	 * @default 'normal'
-	 * @type String
+	 * @type String|Number
 	 */
 
 	/**

src/text/PointText.js

@@ -50,7 +50,7 @@ var PointText = TextItem.extend(/** @lends PointText# */{
 	 * 	content: 'The contents of the point text',
 	 * 	fillColor: 'black',
 	 * 	fontFamily: 'Courier New',
-	 * 	fontWeight: 'Bold',
+	 * 	fontWeight: 'bold',
 	 * 	fontSize: 25
 	 * });
 	 */

src/text/TextItem.js

@@ -114,7 +114,7 @@ var TextItem = Item.extend(/** @lends TextItem# */{
 	 *
 	 * @name Style#fontWeight
 	 * @default 'normal'
-	 * @type String
+	 * @type String|Number
 	 */
 
 	/**