Add pane would add the new pane outside region styling
  Add pane would not appear in empty regions
  Panes could not be dragged to empty regions
  Save would lose content if they were inside stylizer styled regions

Change "panels_layouts" table name to "panels_layout" as it should be (no update_x hook for this). Fix a couple of flexible bugs introduced in new changes.

Clean up flexible. Attempt to reduce the use of unnecessary divs.
Add more ability to control flexible classes.
Add ability to fix flexible canvas to a set width.
Allow disabling of scaling for IE6 in flexible.

Deprecated panels_get_panels() function. This will be eventually disappear. Use panels_get_regions() instead.

state. Very hacky for now, needs much improving.

variant creation wizard.

calling it 'default' was misleading since sometimes the legacy renderer
actually acts as the true 'default' (the renderer that's used when no
other one is specified).

constructor by checking Panels' legacy rendering mode state.

"region-separator", to keep with good namespacing

style plugins.

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

renderer to determine what type of data it should be passing to style
plugins.

within the body of the $ alias checker as it's silly.

missing return that was causing nothing to be rendered at all.

phase responsibilities best practices.

parameter, as that's more inheritance/interface friendly.