In a recent announcement [link] Helen Foster and the Moodle HQ team put forth their new organizational structure for Moodle Documentation. Each major release from here forward (2.1, 2.2, 2.3, etc) will receive its own documentation pages in order to not muddle the information about other live/supported versions.
This should be a great way to update and manage future documentation for the core of Moodle code (independent of modules and themes I imagine). According to the new Docs documentation,
The plan for each new stable version of Moodle is to copy the existing wiki to a new wiki for the new version. The version number will be included in the URL e.g. for the English documentation http://docs.moodle.org/2.0/en/, http://docs.moodle.org/2.1/en/ …
‘Moodle Docs for this page’ links at the bottom of each page in Moodle will link to the appropriate version of the documentation.
The documentation will have a big table of contents and will no longer be separated into teacher and administrator documentation.
Work on the reorganization is ongoing, but you can check it out and follow the changes at MoodleDocs:Moodle_Docs_reorganisation.