Update jfreechart to 1.5.4

Author: arteymix

pom.xml

@@ -212,7 +212,7 @@
 		<dependency>
 			<groupId>org.jfree</groupId>
 			<artifactId>jfreechart</artifactId>
-			<version>1.5.3</version>
+			<version>1.5.4</version>
 		</dependency>
 		<!-- xml-apis is dependent on jena -->
 		<dependency>