Support new acknowledgmentsUseEditor property.
Readme documentation changes.
Readme documentation changes.
Merge @balthisar's commit showing acknowledgments in text view.

Changed `acknowledgmentsUseEditor` to `useTextViewForAcknowledgments`
to make defaulting to `NO` more obvious.

Made sure indentation matches.

Tweaked Auto Layout constraints to make sure the app icon stays
the same size, while the labels and text view can grow.

Bumped cocoapod version number.