Implement hook_module_implements_alter()
Introduce crumbs.block.inc and crumbs.info.inc
Move implementation of hook_permission()
Move implementation of hook_menu()
Move implementation of hook_theme()
Move implementation of hook_theme_registry_alter()
Move implementation of hook_themekey_properties()
Move implementation of hook_block_info()
Move implementation of hook_block_view()
Move implementation of hook_help()
Move page and title callbacks for 'crumbs/special-menu-item/%menu_link' into a separate file.
Move _crumbs_themekey_path2trailpaths() callback to separate file.
Move implementation of hook_element_info()
Validate callback has no return value.
Move _crumbs_admin_flush_cache() callback to a separate file.
Move _crumbs_unserialize_failure() callback to a separate file.
Move form element callbacks to a separate file.
Move theme implementations to separate file.
Remove obsolete section label 'Info hook implementations'.
Introduce a new variation of the plugin weights form, with a select dropdown on each plugin key.