adding gulp task to init to resolve freemarker/docgen/#19
diff --git a/build.xml b/build.xml
index 08e5891..1b12d91 100644
--- a/build.xml
+++ b/build.xml
@@ -157,6 +157,7 @@
       <available file=".ivy" />
     </condition>
     <antcall target="_autoget-deps" />
+    <antcall target="gulp" />
   </target>
 
   <target name="classes" depends="init"