metatags 7.x-1.0-unstable3

Changes since 7.x-1.0-unstable2:

• Adding docblocks for metatag.theme.inc.
• #1277962: Added vertical tab summaries for the metatag fieldset.
• Have revert/delete working.
• #1276292: Fix undefined function calls in metatag_field_attach_rename_bundle() and metatag_field_attach_delete_bundle().
• Fix entity and context info.
• Fixing menu paths.
• Support exporting.
• Trying to fix menu paths for now.
• Disable disable and export links for now.
• Remove 'All' bundle from context array.
• Add 'Advanced' metatag group.
• Add is a local action.
• Add context labels and a cancel link.
• Support collapsed metatag group fieldsets.
• Initial configuration UI.
• Adding re-usable filter-out-defaults function.
• Allow specific entity bundles to have meta tags disabled and added tests for metatag_entity_supports_metatags().
• Added caching for metatag_entity_view_alter().
• Added support for 'profile' in og:type.
• Added support for hook_field_extra_fields().
• Improve default page titles, remove og:latitude for now.