Small improvments for iOS

Hi, I’m really enjoying using this project, it’s exactly what I felt was missing from the mobile web site. So thanks!

I’ve been using it on iOS, so I’ve attempted some small improvements for that platform.

I only added one icon, just trying to follow the lead of the favicon and the  GitHub.com one and your favicon, hopefully that’s okay. It would be fun to do something notification specific, but that’s obviously a whole other thing.

It would also be nice to add [FastClick](https://github.com/ftlabs/fastclick), but I wasn’t totally sure where that should live.

Thanks very much for making this!