slimerjs 0.8.2 (new formula)

In contrast to #22323 is does not install any binary, because it's based on [SlimerJS's Lightweight Edition](http://docs.slimerjs.org/current/installation.html#the-lightweight-edition), which doesn't have the bundled binary of Mozialls XULRunner. The core of SlimerJs is written in shell, js, css and xul and comunicate either with a local Firefox or XULRunner install.
In this Version of the Formula it requiers, that you have Firefox (or XULRunner if you preffer the more difficulty way) installed on your mac and have to set the `SLIMERJSLAUNCHER`enviroment variable to point to it.
The next step would be to add a Formula, which builds Mozillas XULRunner from source, which could be an recommended or optional (have to discuss this) dependencie of formula.