#375686: Create panels_get_current_page_display() to replace the old panels_get_current_page() function.

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

Fix panel page type to actually respect the contexts.

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.

More tweaks to panel delegator stuff, including moving more work from the plugin to delegator.inc and displaying information about the panel display in a delegator dropdown.

Updated panels_load_include() to prevent the re-inclusion of already-loaded include files. Hackish, but eh.

by douggreen: Removed additional t() calls; added str_replace() to exporter to match coding standards.

Changed name of argument error code constants slightly; added brackets in panels_load_include() for clarity.

Forward port of the update to panels_export_display() - disappearance of the 'name' field still needs investigation.