Merge pull request #3 from nandoflorestan/patch-1

README: Correct docs URL

README.rst

@@ -5,6 +5,6 @@ Transactions
 This package contains a generic transaction implementation for Python. It is
 mainly used by the ZODB.
 
-See http://www.zodb.org/zodbbook/transactions.html for narrative
+See http://zodb.readthedocs.org/en/latest/transactions.html for narrative
 documentation on its usage.