CKAN 1.4.3

Major: * Action API (API v3) (beta version) provides powerful RPC-style API to CKAN data (#1335) * Documentation overhaul (#1142, #1192)

Minor: * Viewing of a package at a given date (as well as revision) with improved UI (#1236) * Extensions can now add functions to the logic layer (#1211) * Refactor all remaining database code out of the controllers and into the logic layer (#1229) * Any OpenID log-in errors that occur are now displayed (#1228) * ‘url’ field added to search index (e9214) * Speed up tag reading (98d72) * Cope with new WebOb version 1 (#1267) * Avoid exceptions caused by bots hitting error page directly (#1176) * Too minor to mention: #1234,

Bug fixes: * Re-adding tags to a package failed (since 1.4.1 in Web UI, 1.4 in API) (#1239) * Modified revisions retrieved over API caused exception (since 1.4.2) (#1310) * Whichever language you changed to, it announced “Language set to: English” (since 1.3.1) (#1082) * Incompatibilities with Python 2.5 (since 1.3.4.1 and maybe earlier) (#1325) * You could create an authorization group without a name, causing exceptions displaying it (#1323) * Revision list wasn’t showing deleted packages (b21f4) * User editing error conditions handled badly (#1265)