#844062: Turned the normal drag and drop editor into a renderer plugin, made the IPE part of it. Also some fairly serious code reorganization.

Change "panels_layouts" table name to "panels_layout" as it should be (no update_x hook for this). Fix a couple of flexible bugs introduced in new changes.

Clean up flexible. Attempt to reduce the use of unnecessary divs.
Add more ability to control flexible classes.
Add ability to fix flexible canvas to a set width.
Allow disabling of scaling for IE6 in flexible.

#745808 by Robbert: use number_format() in flexible width calculations to ensure locale settings cannot bork generated CSS.

#683162: Convert all plugins to use new $plugin = array() format. This is less brittle than the specially named hook.

Add a new field to allow setting a panel title from one of its panes.

#460200: Allow regions and columns that have only 'fixed' width items. Disallow changing a 'fixed' item to 'fluid.'

Store a panel task handler's display in the database rather than as part of the handler, allowing flexible to cache the CSS using the display ID.

Introducing the new version of flexible which is both more powerful and comes with a javascripty visual layout designer. It is not yet flawless but it finally works well enough to commit. This commit REQUIRES the twin commit of ctools that is going in.

Improve styles and flexible layout with css caching and moving the rounded corner style fully into its sub directory.

Some major restructuring, catching up to CTools. This is very much in process, there is a huge list of things that need to happen here still, but this may be checkpoint usable to the strong-stomached.