Major cleanup, moved several more functions out to include files, removed some crufty ones. Also refactored the master loader itself some more.

Some refactoring, partially to accommodate changes suggested by douggreen. The basic context-loading problem has not yet been solved, however.

Save routines should now pretty much be functional. The problems appear to now pretty much be limited to context loading/generation at render time. It's not clear if the problem is with panels_page logic, the Panels engine, or some squirrely D6 changes.

Fixed an old error code constant; relocated the handlers to higher up in the file; moved sanitizer back into this main file, other odds and ends.

Docblock updates and changes in code style for references to match merlin's ($a = &$b instead of $a =& $b)

Rewrote master loader to accommodate static panel_pages; rewrote admin loaders to accomodate changes in menu arg processing; moved several more functions out into their respective inc files; added a bunch more docblocks.

Incremental commit; added new loader function designed to grab edit-cache data instead of static-db data.

Incremental commit. Added separate static cache for loaded panels_pages and took steps to ensure consistency in its data. Some additional docblocks, and other small touchups.

1. Expunged all render-time uses of quickref, since we're abandoning that method.
2. Added calls to load the display along with the panel page for admin screens.
3. Added a bit of docblock.

Scratched a couple more unneeded bits from the mask. Moved mask storage directly into the panels_page table, and updated load functions accordingly.

Killed some more of the unnecssary bitmask items; fixed typos; improved hook_menu() readability; safely reconstituted the panels_page_get_current() function for API consistency from D5.

Fixes for E_NOTICE compliance with $load_data. Moved access check to later in the master loader; we don't want Panels denying access to things that it's not overriding!

Incremental commit - numerous behavioral changes. Admin loader relocated to here; re-added implementation of hook_menu() as it now appears possible to cleanly separate it from what must be done in hook_menu_alter(). Cleaned up some docblocks, moved other functions around...lots of stuff.

We're most of the way there! Our separate data storage mechanism appears to be mostly working. Now the frontend loading needs to be done, along with the hook_menu_link_alter() stuff.

Panels Page now installs successfully, although the schema is likely going to change. The essential infrastructure for the menu system is functioning correctly. The secondary router storage mechanism, page callbacks, temporary panel data storage mechanism (for render callbacks) and a few other things need to be designed - but we're on the home stretch.

About three-quarters of the way through the menu system port. Most of the guts are in place, although the bitmasks need considerable work and I've yet to work out a finite solution for sticking the admin tabs in wherever they might need to be.

Initial D6 work -- this includes only panels.module stuff. Right now the drag & drop display editor works, layout, layout settings and render works. Special features such as cache and styles may or may not work.