Information for module developers is obsolete and don't cover all required functionality and requirements such as availability backuplib.php and restorelib.php , or capabilities definition for the role system. This situation confuse 3d party module developers.

The information is obsolete at least in following places:
1. readme.txt file in the mod directory of moodle code
2. Documentation wiki Modules (for Developers)
3. New module template for download

Please update them.