Fixes issue #730 & #731

1. Provides modalView with regexp'ed newURL (without referrer=Baker in it)

2. Not sure if it's the proper way, but adding removeFromSuperview does delete/erase the webView after closing. For example, now a playing youtube video stops, when modalView is closed.

I'm just starting to learn objective-c, so there might be some pitfalls i'm not aware of :)