Add settings

[GijsGoudzwaard]

Add a settings page, where the user can specify how good or bad they want to compress their images.

[stiffler17]

Hi!

I like the interface of https://kraken.io/web-interface
Maybe you'll find it as good as I do.
It is very clear but nevertheless full of settings.

[aries223]

Yes I second the Settings. Add the ability to set the amount of compression we desire. This gives us the ability to compress the file enough to meet file size requirements..
(take a look at ImageOptim on the Mac)