Squashed commit of the following:

commit 7f659547b3b5d8de34a1e4b136b5e899ae7878da
Author: Tod Beardsley <todb@metasploit.com>
Date:   Mon Dec 1 07:54:53 2014 -0600

    Add a pointer to true and correct docs

    See #4000. Seems kind of pointless to ship all these bytes when we host
    everything on GitHub and provide tools to generate docs yourself.

commit 01668c8529454ffb0438aadef62eafb5045503ce
Author: Tod Beardsley <todb@metasploit.com>
Date:   Mon Dec 1 07:39:11 2014 -0600

    Remove old documentation

    The last significant commit in this directory was a844b5c3 , which
    touched a sample browser module. Before that, changes were either
    ranging across the codebase, or surgical removal of out of date
    documentation.

    This all is looking to me like fairly useless historical artifacts.

    See #4000 for more discussion.
Restore the hallowed developer's guide

See #4286, @tdoan-r7 and @wchen-r7's comments on why that should stay
(for now).
Land #4286, rm documentation

Moved to GitHub.