Fix Python 2/3 doctest incompatibility

README.rst

@@ -87,6 +87,9 @@ environment.
 
 Here is an example:
 
+..
+    >>> from __future__ import unicode_literals
+
 >>> import jaydebeapi
 >>> conn = jaydebeapi.connect("org.hsqldb.jdbcDriver",
 ...                           "jdbc:hsqldb:mem:.",