Restores the old node API.

- Patch #76444 by chx, moshe, eaton, angie et al: make it possible to control access to form elements.

- Patch #77919 by chx, eaton, moshe, et al: enable programmaticaly submitted forms via the pull model.

See: http://drupal.org/node/64279#t-placeholders

   + reorganized ?q=admin/settings
   + deprecated the _settings hook

- Patch #46746 by Matt: fixed inconsistent encoding of path aliases.  Fixes broken URLs on profile pages.

- Patch #39778 by chx: obliterate nodeapi op form in favor of the forms API's way of doing things.  Tested with help from webchick.

  TODO:
  + The contact.module was broken; a new patch for contact.module is needed.
  + Documentation is needed.
  + The most important modules need to be updated ASAP.

  TODO: document the defaults in the PHPdoc comments.

- Patch 20910 by chx: centralize print theme page.