#841824 by levacjeep: Extend panels_edit and panels_edit_layout to allow more options with the $destination.

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

Deprecated panels_get_panels() function. This will be eventually disappear. Use panels_get_regions() instead.

submit callbacks.

Introduce the Panels stylizer module which builds on the CTools stylizer base to create user definable, recolorable styles.

#607420: Visibility rules did not appear in the list when added to a pane (though they still applied).

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

Change use of "content" div to "pane-content" and "title" to "pane-title" to prevent conflicts with other things that use these fairly generic classes.

Clean up caching of displays in page manager. Still need to do mini panels and panel nodes, I suppose.

Added allowed layouts to settings form for panel pages, nodes, minis.

Fix panel page type to actually respect the contexts.

Break panels_node_content into a module + a .inc file to more clearly represent how content types can work in a module. Also fix several notices by providing defaults for the form.

Add a new directive to content types to allow fetching information about a single subtype (i.e, view, block) rather than all at once.

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.

Ensure "context.inc" is loaded prior to any unserializing of Panel cache so that ctools_context objects do not barf.

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.