Merge pull request #105 from aharwood2/fix/build

Added flag to build configure to skip clean when files don't exist

build.xml

@@ -227,7 +227,7 @@
   </target>
 
   <target name="clean.module.jblockcreator" description="cleanup module">
-    <delete includeemptydirs="true">
+    <delete includeemptydirs="true" failonerror="false">
 		<fileset dir="${jblockcreator.output.dir}">
 			<include name="**/*"/>
 			<exclude name="**/com/**"/>