#366250 by sirkitree: Fix deprecated jquery selectors so we can work with jquery 1.2.6 as well as 1.3.2.

#353515: Many characters could get incorrectly translated in exposed filters combined with ajax tablesorting.

Views exposed forms might not get seen by javascript if they had multiple _ in the view name or display id (by Steven)

#316203: Exposed filters not functioning in some circumstances due to underscores in display IDs not matching dashes in CSS ids

Since it's not easily possible to do the views filter block externally, bring the functionality directly into Views, including modifying the ajax for that to work.

#311745 by mooffie: Incorrect use of replaceWith caused invalid data sent through attachBehaviors().

#296765: user autocomplete incorrectly required administer views access. Also incorrectly required Views UI module.

#270892 by aclight (expanded by me): put default action and validator options in a fieldset to make the form less confusing.

NEW: argument defaults and validation; pluggable. This will greatly ease some of the problems with argument discovery. We need to get a few more basic plugins written for this.

Most of user.views.inc plus some bug fixes, improvements to join handling. For those interested in the real complexities, check out views_handler_filter_many_to_one to see cool stuff you can do with joins in views 2 that you could not in views 1