#263354 by joshk: Allow panels_node nodes to be created programmatically by allowing $layout to be set through $node prior to checking arg(3).

#260221 by sun, Pancho. Primarily codestyle cleanup; also fixed some missing leading slashes that were causing the edit icons not to appear in the new helptext for the display editor.

Add legacy views; also add more administrative exposure to help the user learn where administration is.

#191536: panel node layout page really wanted to control the node/add/panel screen even with a layout selected

Major rework of context; fully implemented multiple context, context conversion to arguments and now Views can accept contexts. This is a major step toward turning context into a Fully Operational Battle Station.