Beginning refactoring of BTree code to allow cleaner sharing with RTree. Factored out the free page manager in this commit.

git-svn-id: https://hyracks.googlecode.com/svn/branches/hyracks_indexes@366 123451ca-8445-de46-9d55-352943316053
diff --git a/pom.xml b/pom.xml
index 0b5ed07..619c635 100644
--- a/pom.xml
+++ b/pom.xml
@@ -61,6 +61,7 @@
     <module>hyracks-control-nc</module>
     <module>hyracks-cli</module>
     <module>hyracks-storage-common</module>
+    <module>hyracks-storage-am-common</module>
     <module>hyracks-storage-am-btree</module>
     <module>hyracks-storage-am-invertedindex</module>
     <module>hyracks-test-support</module>