Typo fix
Mention that pgsql and sqlite may keep on using 2.x.x and enjoy Django >= 1.4 support [ci skip]
City.search_names should not be indexed on MySQL
Try the right city search names field class
Revert "Try the right city search names field class"

This reverts commit 756771674d5b15bd36e78c8bc6b6e743411da72e.