#749504 by hefox: Add a bit of documentation explaining that block.tpl.php ignores Panels specific block fields.

"region-separator", to keep with good namespacing

callback property from 'render panel' to 'render region', changed some
variable names inside the plugins. Not all working yet, though.

This is a major change, though one that shouldn't affect any existing
Panels implementations (unless they're using region styles in a totally
unanticipated way). Rather than having style plugins with region support
call panels_render_pane() themselves on a pane content object, this
change moves that logic further up into the render pipeline and simply
passes the regions an array of already-rendered/styled/themed pane
output.

submit callbacks.

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

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.