Added directories lib/yaml and lib3/yaml to MANIFEST.in.
diff --git a/MANIFEST.in b/MANIFEST.in
index 38f7863..185e780 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,6 @@
 include README LICENSE CHANGES setup.py
+recursive-include lib/yaml *.py
+recursive-include lib3/yaml *.py
 recursive-include examples *.py *.cfg *.yaml
 recursive-include tests/data *
 recursive-include tests/lib *.py