Use view_build_column to return the HTML for the new column when a column is added. Renamed a method call to match the change in viewlib. Added what I'm going to do next to the comment.

More progress on the views frontend. There are stubs for several actions, and javascript implementations of those actions.

With javascript, an AJAX request is made to retrieve the new blocktypes. Without javascript, a standard GET request changes which one is displayed. When javascript is on, the radio buttons are not sent back.

Currently contains a bunch of hardcoded data that needs translating into api calls, a javascript overlay file for the rich UI, a CSS file for laying out the UI page, a smarty template for the HTML, and a metric ton of work still to do.