- Some fixes to the code-style.sh script.

- Improvment: detect wrong mixed case variables, be more strict about XHTML.

- Dropped check_input(); use check_query() instead.

- Made the statistics module use referer_uri() for security's sake.

- allow $var++ and $var-- syntax.

update.php / block.module
- cleaned up coding style, and trailing spaces.

- Updated the coding style checker. (patch by Alex)

- fixed a SQL typo in node.php: user --> users

- added SQL table keys for the node types

- Added a *cool* new Perl script by Alexander.  You can use this script
  to check your code against the Drupal coding style:

   "This program tries to show as many improvements as possible with no
    false positives."