token 5.x-1.15

Changes since DRUPAL-5--1-14:

• #252241 by EmanueleQuinto, isaac.niebeling, Dave Reid: Added [log] and [log-raw] tokens for node revision log message.
• #821052 by Dave Reid: Fixed CCK tokens not included.
• #821238 by Hidehisa, Dave Reid: Fixed incorrect backport node taxonomy SQL query.
• #224262 by nicholasThompson, Dave Reid, jaydub, jpfle, greggles, tobiasb: Added current page tokens (path, URL, and page number).
  by Dave Reid: Prevent PHP notices if $node->log is not defined.
  by Dave Reid: Values run through url() are always escaped, so there is no need for a [node-url-raw] token.
  #490378 by Dave Reid | kiamlaluno: Cleaned up token descriptions and inconsistent use of punctuation.
  #321487 by Dave Reid, eMPee584 | greggles: Added [comment-node-title] token for a comment's node title.
  by Dave Reid: Add a form element validation callback for invalid token context checking.
  #587148 by Dave Reid, rfay: Added special warning and array merging when more than one module defines the same token.
  by Dave Reid: Adding node-path and node-url tokens.
  #375887 by Dave Reid: Added 'since' and 'small' date tokens and standardized node [mode] and user [reg] and [log] tokens.
  by Dave Reid: Use constants for default token prefix and suffix.
  by Dave Reid: Backported token_get_invalid_tokens_by_context().
• by Dave Reid: Added [current-page:title] token.
  by Dave Reid: Adding proper token API documentation.
• by Dave Reid: User URLs should be absolute, not relative.
  by Dave Reid: Fixed incorrect parameters for url().