Add copy of about:rights page from Firefox

Minor changes in copy have been made to make the text work in a static document (the in-browser version has a few sections hidden behind disclosure links)

[Bug 1052571](https://bugzilla.mozilla.org/show_bug.cgi?id=1052571)
Here's my idea: please move the highlighted section in this screenshot: http://screencast.com/t/yXC5UuEhGUb to the end

(1) The sentence that is currently in line 13 should end in ". . . under the terms described below."
(2) The numbered sentences should immediately follow.  (these are the "terms" that line 13 references)
(3) Add the highlighted section in the screenshot after the last numbered section of the terms (which is #7)
(4) Change the first sentence in the highlighted section so it says "or the terms ABOVE are unacceptable"

Let me know if this works.