Ported r27 to 0.1.x branch.
Ported r27 to 0.1.x branch.

--HG--
branch : 0.1.x
extra : convert_revision : svn%3A7a298fb0-333a-0410-83e7-658617cd9cf3/branches/0.1.x%4028

djc/couchdb-python,djc/couchdb-python,infinit/couchdb-python,Roger/couchdb-python