Changed post-arg context build check to be aware of the fact that we now use error codes for argument plugins, and it should only load add'l contextual data if the return is an object (aka, isn't numeric)

View panes display plugin. Note that this checkin may break a bunch of content types because I added $subtype to some content type declarations and need to go through all the content types and update the render and title functions.

plugin loading.

Original fix was made in version 1.1.2.47 of plugins.inc.

Templatize all panel layouts; give each layout its own directory for cleanliness. Slight improvement to the API needed for the move to work.

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.