Added the r-tree package

git-svn-id: https://hyracks.googlecode.com/svn/branches/hyracks_indexes@376 123451ca-8445-de46-9d55-352943316053
diff --git a/pom.xml b/pom.xml
index 619c635..0b59a29 100644
--- a/pom.xml
+++ b/pom.xml
@@ -64,6 +64,7 @@
     <module>hyracks-storage-am-common</module>
     <module>hyracks-storage-am-btree</module>
     <module>hyracks-storage-am-invertedindex</module>
+    <module>hyracks-storage-am-rtree</module>
     <module>hyracks-test-support</module>
     <module>hyracks-tests</module>
     <module>hyracks-server</module>