This is the beginning of a large "move developer docs from the wiki
to the tree" operation, which will probably take some time to complete.
The general goal is to consolidate all docs that would be used by developers
(i.e., anyone working on the Haiku tree) into the tree itself. Docs on
getting started contributing, or for translators, designers, etc. will remain
on Trac and on the website.
Written by DarkWyrm, this user guide has been long since superseded by
the new HTML-based User Guide, which has everything this did and then
some, with the exception of the "History" section. That section
does seem like it could be useful somewhere, so I've moved it to
its own file in the "docs/misc" directory.