Switch to side-by-side view

--- a/build.xml
+++ b/build.xml
@@ -1,7 +1,7 @@
 <project basedir="." default="build" name="PreservationIdentifier-client">
     <property name="debuglevel" value="source,lines,vars" />
-    <property name="target" value="1.6" />
-    <property name="source" value="1.6" />
+    <property name="target" value="1.7" />
+    <property name="source" value="1.7" />
     <path id="PreservationIdentifier-client.classpath">
         <pathelement location="bin" />
         <fileset dir="lib" />