Issue #1280582 by Damien Tournoud: The collapsible div handler should be hidden with javascript disabled.

Issue #1070058 by jessebeach: Implement a new dropdown button that is somewhat nicer than the older dropdown.

     Conflicts:
         CHANGELOG.txt
         css/modal.css
         ctools.module
         ctools_plugin_example/plugins/access/arg_length.inc
         ctools_plugin_example/plugins/access/example_role.inc
         help/export.html
         includes/ajax.inc
         includes/cleanstring.inc
         includes/content.inc
         includes/content.menu.inc
         includes/context-task-handler.inc
         includes/context.inc
         includes/context.theme.inc
         includes/css.inc
         includes/export.inc
         includes/modal.inc
         includes/object-cache.inc
         includes/plugins.inc
         includes/wizard.inc
         js/ajax-responder.js
         js/collapsible-div.js
         js/dependent.js
         js/dimensions.js
         js/mc.js
         js/modal.js
         page_manager/page_manager.admin.inc
         page_manager/page_manager.module
         page_manager/plugins/tasks/page.inc
         page_manager/plugins/tasks/search.inc
         page_manager/plugins/tasks/user_view.inc
         plugins/access/context_exists.inc
         plugins/access/node_language.inc
         plugins/access/perm.inc
         plugins/access/php.inc
         plugins/access/role.inc
         plugins/access/site_language.inc
         plugins/access/term.inc
         plugins/access/term_vocabulary.inc
         plugins/content_types/block/block.inc
         plugins/content_types/custom/custom.inc
         plugins/content_types/node/node.inc
         plugins/content_types/node_context/node_comment_form.inc
         plugins/content_types/node_context/node_comments.inc
         plugins/content_types/node_context/node_content.inc
         plugins/content_types/page/page_breadcrumb.inc
         plugins/content_types/page/page_footer_message.inc
         plugins/content_types/page/page_help.inc
         plugins/content_types/page/page_messages.inc
         plugins/content_types/page/page_mission.inc
         plugins/content_types/page/page_slogan.inc
         plugins/content_types/page/page_tabs.inc
         plugins/content_types/page/page_title.inc
         plugins/content_types/search/search_result.inc
         plugins/contexts/node_edit_form.inc
         plugins/contexts/term.inc
         plugins/contexts/terms.inc
         plugins/contexts/user.inc
         plugins/relationships/book_parent.inc
         views_content/plugins/content_types/views.inc
         views_content/plugins/content_types/views_panes.inc
         views_content/views_content.module

Fix context availability when more than 1 context is needed. Make context selector always visible if contexts are needed.

Expand the context to allow the plumbing for replacing placeholder contexts with real contexts for preview.

More robust AJAX stuff that will eliminate some ugly errors plus prevent double clicks on ajax links.

Initial commit of content API into ctools. Only one content type is ported, but there are some docs.

Retool the access plugins to allow multiple plugins plus and/or switch. Retool selection criteria to use this allowing for a much richer selection of task handlers on a given page.

A tool to facilitate multi-step wizards. I do not think this is quite finished yet but it handles the simple case pretty well.

- a tool for AJAX, which is the next generation tool based on what Views uses.
- a tool for modals -- completely ripping the modal out of Panels.
- moving plugins for 'arguments', 'relationships' and 'contexts' into CTools.

Add callbacks to the collapsible so that it can be trivially transformed into other things like an accordion. Add accordion functionality to the task admin UI.