book_access 6.x-2.0-alpha2

Changes since DRUPAL-6--2-0-ALPHA1:

• By kiam: Corrected the code that was not using the class BookAccessVars.
• By kiam: Changed some function names to follow the schema [noun]_[verb].
• By kiam: Updated the Doxygen comments used for functions, classes, and methods.
• #911472 by kiam: Warning messages when accessing /admin/by-module.
• #891492 by kiam: Avoid full node access rebuilding.
• #920570 by kiam: Add support for the pseudo-role 'author'.
• #921776 by kiam: Change usernames in links to user profiles.
• #921284 by kiam: Implement more permissions.
• #920422 by kiam: Add the permission "edit outline".
• #921730 by kiam: Implement more book permissions.
• By kiam: Slightly changed the books settings page.
• #842992 by kiam: Book access API.
• By kiam: Removed an empty control structure.
• By kiam: Slightly optimized the code, changed some functions parameters, corrected the Doxygen comment of some functions.
• By kiam: Changed the update functions.