storage: switch index data structure from skiplist to std::set

test performance of skiplist and std::set

Change-Id: I0aa7f34e57f17a83b96fed3885d6cc6f59ad52dd
diff --git a/tests/other/wscript b/tests/other/wscript
new file mode 100644
index 0000000..6bb9fb6
--- /dev/null
+++ b/tests/other/wscript
@@ -0,0 +1,10 @@
+# -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
+
+top = '../..'
+
+def build(bld):
+    bld.program(target="../../skiplist-smoketest",
+                source="skiplist-smoketest.cpp",
+                use='ndn-repo-objects',
+                install_path=None,
+                )
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