wiki pages iterated, reorged somewhat

[Dan Mosedale]

After a call with Humph where we iterated and worked on clarifying the
verbiage on our about, I split the main Paladin web-page into several.
This should mean less eyes glazing over, and my hope is that it's
organized in a way that will better serve the various audiences who show
up to get a better idea of just what Paladin is. A significant chunk of
the original overview about Paladin is on the About page (linked to from
the (more...)).

As usual, this is an ongoing evolution; parts are just bullet points
that want to be real text, and suggestions/improvements are very much
welcomed.

https://wiki.mozilla.org/Paladin

Dan