#711664 by neclimdul: Deprecate the plugin hook which should no longer be used; all plugins should be file based.

#709754 by yhahn: Add export_module flag to all default objects so that we can tell where they came from.

#708154: Update and Save would leave forms in an older state, causing some forms to lose data (particularly the Panels content form).

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.

#686764: Update page tokens to use actual page rendering mechanism rather than the tokens which causes them to appear as having content even when empty.

#604976: Prevent Page Manager from throwing errors when no modules that provide variants are available.

#573646: Attempt to make sure page manager does not try to respond to menu/theme hooks when CTools is not enabled.

#639548: export.inc cache was not properly respected when loading individual items, leading to multiple redundant queries.

#654218 by Roi Danton: Improve documentation of dependent.inc to talk about annoyances with checkboxes, radios and fieldsets.

#661332 by yhahn: Allow export.inc to export stdClass objects by exporting them as an array and casting them to an object.

#651852 by coreyp_1: Add caching to content subtypes to save some queries. This means developers will need to clear caches when changing content type code.

#625696 by dmmckenna: Bulk exporter did not define empty array at beginning in code it creates for you.

Added support for context keyword substitutions on override paths in content panes provided by views_content.

Introduce 'export callback' to individual fields in export.inc. Add some documentation to export.html -- much of it borrowed from stella!