Update to database structure.

git-svn-id: https://plugins.svn.wordpress.org/cp-polls/trunk@1016722 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update to database structure.

git-svn-id: https://plugins.svn.wordpress.org/cp-polls/trunk@1016729 b8457f37-d9ea-0310-8a92-e5e31aec5664