Fix some typos; allow plugins to automatically have child plugins, kind of like how content types do only much better.

Moved Panels stylizer UI to CTools. If you use Panels Stylizer, be sure to update Panels at the same time.

#836828 by jmiccolis: ctools_include() would try to include again even though it was trying to statically cache a list of files already included.

#635730 by dereine and merlinofchaos: Fix page title pane to show actual title. Allow the tag and tag class and id to be specified in pane settings.

#815164 by DeFR: Replace fragile server side cache of aggregated .js and .css with more robust embedded .js communicating this information.

more informative variable naming scheme.

committed that definitively require a new version.

#745468 by alevine and Scott Reynolds: Make ajax better able to know what .js/.css was already on the page.

#723296 by andrewlevine: Generalize more of CTools helpers so they can be used for non-CTools files.

Initial inclusion of the stylizer plugin to create user customizable styles from pre-configured base styles.

Allow themes to provide default pages so that Panels Everywhere enabled themes can provide layout variants for the site template.

Add a couple of support functions for ctools_set_page_token that are meant to be used by themes.
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#545540 by Roger López: Add 5 page elements as available panes for using Panels as your primary page layout: breadcrumb, page title, messages, tabs and help box.

Remove the delegator module, introduce the page manager module. Anything that previously relied on delegator module must now change its code to rely on page manager instead!