[Greasemonkey] Alternative script injection technique proof of concept

[Aaron Boodman]

> As far as the sandbox goes ... bring on firefox 1.1, because I still
> haven't figured out if/how evalInSandbox and the Sanbox object can be
> used in ff 1.0.5

It can't, I was totally off there. It was only available to *content*
prior to 1.1

So our options are to implement it ourselves, only be compatible with
1.1, or have a neutered mode for < 1.1.

-- 
Aaron