#51002: Admins could not see unpublished comments (plus minor usability enhancements for previewing/unpublished)

  Deprecates the primary_links module.

  This patch was much needed.  Thanks Richards!

  NOTE: if some themers could investigate if there is room for improvement
        with regard to theming, that would be awesome.

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

- Patch #21855 by TDobes: the recent commit of phptemplate caused a number of problems for non-phptemplate themes. A patch is attached to address these issues.

  Changes include:
    * parsing of the primary/secondary links has been moved out of phptemplate and into theme_get_setting.
    * unnecessary and XHTML-invalidating duplicate div#help removed from themes/bluemarine/page.tpl.php (this is already generated by theme_help)
    * weird generation of the "edit primary/secondary links" messages removed from bluemarine and placed in theme.inc
    * unnecessary changes to themes/bluemarine/style.css rolled back (the phptemplate bluemarine had an older version of style.css than the one in core)
    * chameleon updated to work with new link scheme (passes links through theme_links)

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

- Patch #12886 by thorne: fixed XHTML problem: the bluemarine theme used a border=0 attribute on the img tag for the site logo.

1) Clean up the text analyser: make it handle UTF-8 and all sorts of characters. The word splitter now does intelligent splitting into words and supports all Unicode characters. It has smart handling of acronyms, URLs, dates, ...

2) It now indexes the filtered output, which means it can take advantage of HTML tags. Meaningful tags (headers, strong, em, ...) are analysed and used to boost certain words scores. This has the side-effect of allowing the indexing of PHP nodes.

3) Link analyser for node links. The HTML analyser also checks for links. If they point to a node on the current site (handles path aliases) then the link's words are counted as part of the target node. This helps bring out commonly linked FAQs and answers to the top of the results.

4) Index comments along with the node. This means that the search can make a difference between a single node/comment about 'X' and a whole thread about 'X'. It also makes the search results much shorter and more relevant (before this patch, comments were even shown first).

5) We now keep track of total counts as well as a per item count for a word. This allows us to divide the word score by the total before adding up the scores for different words, and automatically makes noisewords have less influence than rare words. This dramatically improves the relevancy of multiword searches. This also makes the disadvantage of now using OR searching instead of AND searching less problematic.

6) Includes support for text preprocessors through a hook. This is required to index Chinese and Japanese, because these languages do not use spaces between words. An external utility can be used to split these into words through a simple wrapper module. Other uses could be spell checking (although it would have no UI).

7) Indexing is now regulated: only a certain amount of items will be indexed per cron run. This prevents PHP from running out of memory or timing out. This also makes the reindexing required for this patch automatic. I also added an index coverage estimate to the search admin screen.

8) Code cleanup! Moved all the search stuff from common.inc into search.module, rewired some hooks and simplified the functions used. The search form and results now also use valid XHTML and form_ functions. The search admin was moved from search/configure to admin/search for consistency.

9) Improved search output: we also show much more info per item: date, author, node type, amount of comments and a cool dynamic excerpt à la Google. The search form is now much more simpler and the help is only displayed as tips when no search results are found.

10) By moving all search logic to SQL, I was able to add a pager to the search results. This improves usability and performance dramatically.

Replace hardcoded <html lang="en"> with a locale dependant one. This is especially important for asian sites where this has an effect on font selection.

- Fixing 'flash of unstyled content' in bluemarine/pushbutton, which got reintroduced after the template changes.
- Fixed separate styles: added theme_get_styles() and the xtemplate {styles} tag to make sure stylesheets get included in the right order (drupal-specific, template-specific, style-specific).
- Fixing missing class on screenshots.
- Renamed drupal_get_theme_setting() and drupal_get_theme_settings() to theme_get_setting() and theme_get_settings().

   + removes 'toggle_search' from the features array in chameleon.theme
   + merges changes to bluemarine from just a couple of hours before template patch was committed