Update copyright notice also in manifest

Author: codeling

bfstop.xml

@@ -4,7 +4,7 @@
 	<author>Bernhard Froehler</author>
 	<description>PLG_BFSTOP_DESC</description>
 	<creationDate>November 2012</creationDate>
-	<copyright>Copyright (C) 2013 by Bernhard Froehler</copyright>
+	<copyright>Copyright (C) 2012-2014 by Bernhard Froehler</copyright>
 	<license>GNU/GPLv3 http://www.gnu.org/licenses/gpl-3.0.html</license>
 	<homepage>https://github.com/codeling/bfstop</homepage>
 	<authorEmail>bfstop@bfroehler.info</authorEmail>