$node->weight property was being shared by weight and book modules. renamed weight property $node->node_weight

also new help section and better overall access permission handling

Fixed problem with settings not getting saved.

- Removed the individual LICENSE files from the contributions repository:
  see mailing list discussion.

http://drupal.org/node/11517. I have done this using some command line magic:

find . -name README -exec cp '{}' '{}.txt' \; -exec cvs remove -f '{}' \; -exec cvs add '{}.txt' \;

I will update all occurences of 'README' to 'README.txt' in the conrtib CVS,
soon. I'll also rename LICENSE, CHANGELOG etc. files as soon as I get around
to it.

by the coding standards, see CODING_STANDARDS.html). I also unified the
format and the location of the $Id$ tag. It starts with "//" and is placed
on the second line in all *.module files, now.