change target back to 1.6
diff --git a/pom.xml b/pom.xml
index 4a440bd..4f3ebdd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -685,8 +685,8 @@
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-compiler-plugin</artifactId>
           <configuration>
-            <source>1.7</source>
-            <target>1.7</target>
+            <source>1.6</source>
+            <target>1.6</target>
           </configuration>
         </plugin>
         <plugin>