Prepare collections module for pure python code entries.
diff --git a/Lib/collections.py b/Lib/collections.py
new file mode 100644
index 0000000..0d9254c
--- /dev/null
+++ b/Lib/collections.py
@@ -0,0 +1,3 @@
+__all__ = ['deque', 'defaultdict']
+
+from _collections import deque, defaultdict