#42304, CSS update for Pushbutton Theme, patch by Megagrunt

  TODO: update the "Migrating themes from Drupal 4.6 to Drupal HEAD"-page in
        the Drupal handbook!
  TODO: update the themes in the contributions repository.

- Converted the Bluemarine theme from XTemplate to PHPTemplate.
- Moved the the Pushbutton theme and the Xtemplate engine to the contributions repository.

- #9576 : A last-minute fix for pushbutton in Opera/Konqueror/Safari got lost in the move to the new template system.
http://drupal.org/node/9576#comment-11328
This still suffers from the Safari gamma bug, which we agreed not to cater to.

- Patch #9988 by MegaGrunt: visual improvements to the tabs in Pushbutton.

- Theme system changes.  Please consult http://drupal.org/node/view/9576 for details.

- Removing gAMA chunk from xtemplate logo.png for less to avoid more gamma issues.

- Restoring background coloring for the watchdog logs (was broken)
- Making watchdog backgrounds lighter, makes it easier on the eyes and improves readability.
- Adjusted the spacing between items on the frontpage a bit to be clearer.
- Fixed the vertical stretching of table rows with form controls in them.

- Changed the way status messages are printed as per Kristjan's suggestion:
  http://drupal.org/files/issues/error_messages_list.png (issue #9138).

  drupal_set_message() has been changed to group message by type and a
  helper function, theme_status_message(), is added to display the messages.
  Chameleon and Xtemplate have been updated to use this new function.

- Updated CHANGELOG.txt.

- Patch #8617 by TDobes: changes all gifs to pngs for better consistency (and
  to get of proprietary formats).

- Added forum-sticky.png.  Made by Steven.

- Patch #7581 by bylund: made the archive module's calendar accessible.

- Patch #7330 by MegaGrunt: turns primary and secondary link ids into a classes,
  and assigns the classes to header and footer.  Also renamed a few elements to
  make them more logical/consistent.  Plus added search id around search area,
  and a few other minor improvements.

- Patch #7120 by MegaGrunt: made the title of nodes the same size on home page as on the node page and improved the various header styles to give better visual indication of hierarchy.

- Rewrote the profile module:

   + Added a 'created' field to the users table and renamed the 'timestamp'
     fied to 'changed' (cfr. node table).  Update.php will try to determine
     a 'created' timestamp for existing users.

   + The profile module no longer uses serialized data but has its own set
     of tables.  Known existing profile data is migrated by these new tables.
       TODO: migrate the birthday field.

   + The profile fields can be grouped, and within each group, profile fields
     can be sorted using weights.

   + The profile pages can be themed.

   + The profiles can be browsed based on certain properties/settings.

   + Change the _user hook: (i) 'private_view' and 'public_view' are merged
     into 'view' as there are no private fields and (ii) 'edit_form' has
     been renamed to 'edit'.

   + Avatar handling has been refactored and is now part of the user module.
     The users table has a dedicted 'picture' field.

   + Simplified the way themes should use display/visualize pictures or
     avatars.

   + Made it possible for administrators to replace or delete avatars.

   + ...

  I hope this make for a good base to build on collectively.

  the header logo image, so that multiple lines of text can be added to Primary
  menu without breaking the design.

- Patch by Gerhard: move the updates to database/updates.inc so packaging
  systems can by-pass update.php.

- Intitial version of the Pushbutton theme: contributed by MegaGrunt!