autosave 7.x-2.2

Changes since 7.x-2.1:

• Ensure the form page callack is included in $form_state['build_info']['files'].
• Fixed PHP strict warning: Creating default object from empty value in autosave_save().
• Cleanup autosave_form_alter() to use the node form base ID alter hook and proper #attached properties for libraries and JavaScript settings.
• Split the jquery.autosave file into a separate library.
• Added hook_library() implementation so the required JS and CSS is more easily added.
• Cleaned up info file and added configure URL for modules page.
• #1425894 by freblasty, pjcdawkins, Deciphered, eugene.ilyin, maris.abols: Added support for CKEditor.
• #1585408 by HEY_GERMANO, agentrickard, Deciphered: Fixed PHP Fatal error: Call to undefined function language_negotiation_get_any().