Add settings

[Dmitry Semigradsky]

It would be nice to be able to disable some features. IE hacks for example.

Something like

  postcss: [
    cssgrace({
        ieOpacity: false,
        ieInlineBlock: false
    })
  ],

[Qikker Online]

👍 would be great to be able to turn each feature on or off. really don't need some of them. Thanks!

[Eric Quanz]

+1

[Alexander Savin]

+1 here too, especially on image resizing