- made the user information block into two different blocks. One for

  login and one for user information.
- added link to help in book module (post-patch, see below).
- applied various patches:
  Patch by Greg Tyrelle <greg@tyrelle.net>
  - tracker module now shows usernames next to comments.

  Patch by Moshe Weitzman <moshe@wallaware.com>
  - book module has a more complete help.
  - added administrative link to export book to html
  - fixed non book nodes not showing up in trees.

  Patch by moshe weitzman <weitzman@tejasa.com>
  - links can be defined in the configuration file.