Create directory if necessary when using build script
diff --git a/build.xml b/build.xml
index bb27632..124ee77 100644
--- a/build.xml
+++ b/build.xml
@@ -26,6 +26,7 @@
         <get src="http://repo1.maven.org/maven2/org/apache/ivy/ivy/${ivy.version}/ivy-${ivy.version}.jar" dest="${user.home}/.ivy2/jars/ivy-${ivy.version}.jar" usetimestamp="true"/>
         <taskdef resource="org/apache/ivy/ant/antlib.xml" uri="antlib:org.apache.ivy.ant" classpath="${user.home}/.ivy2/jars/ivy-${ivy.version}.jar" />
 
+        <mkdir dir="${user.home}/.ant/jars/"/>
         <get src="http://repo1.maven.org/maven2/ant-contrib/ant-contrib/1.0b3/ant-contrib-1.0b3.jar" dest="${user.home}/.ant/jars/ant-contrib-1.0b3.jar" usetimestamp="true" />
         <taskdef resource="net/sf/antcontrib/antcontrib.properties" uri="antlib:net.sf.antcontrib" classpath="${user.home}/.ant/jars/ant-contrib-1.0b3.jar" />
     </target>