Fixed #4 URL Parameters so that this can be used recursively now.

This would now work: http://dfcb.github.com/Responsivator/?site=dfcb.github.com/Responsivator/
![Double Nested](http://f.cl.ly/items/1K1f3F0O2I2T173w2J3s/Screen%20Shot%202013-03-24%20at%202.04.56%20PM.png)
:neckbeard: