Added focus and getLineCount methods.

AceGWT/src/edu/ycp/cs/dh/acegwt/client/ace/AceEditor.java

@@ -226,7 +226,24 @@ public native String getText() /*-{
 		return editor.getSession().getValue();
 	}-*/;
 
-
+	/**
+	 * Causes the editor to gain input focus.
+	 */
+	public native void focus() /*-{
+		var editor = [email protected]::editor;
+		editor.focus();
+	}-*/;
+
+	/**
+	 * Retrieves the number of lines in the editor.
+	 * 
+	 * @return The number of lines in the editor.
+	 */
+	public native int getLineCount() /*-{
+		var editor = [email protected]::editor;
+		return editor.session.getLength();
+	}-*/;
+
 	/**
 	 * Set the complete text in the editor from a String.
 	 *