table: ContentStore based on skip list

ref: #1212

Change-Id: Iaa13aa7c110c3cd059438bf553a19b4fcd07e137
diff --git a/daemon/common.hpp b/daemon/common.hpp
index 650541e..3a39f99 100644
--- a/daemon/common.hpp
+++ b/daemon/common.hpp
@@ -36,6 +36,7 @@
 
 #include <vector>
 #include <list>
+#include <queue>
 #include <set>
 #include <sstream>
 #include <istream>