Update examples to use the new cover mode options.

Closes #20

LGTM given by: @

Squashed commit of the following:

commit f5bdeb9d8ba6e8e6a25cf78c21c71b34b7d14370
Author: Matthias Plappert <matthiasplappert@me.com>
Date:   Fri Apr 11 19:25:25 2014 +0200

    Fix typo.

commit a6540ec1aa7116e252bf0d084c8985c6c47a51ce
Author: Matthias Plappert <matthiasplappert@me.com>
Date:   Fri Apr 11 18:58:46 2014 +0200

    Fix JSON.

commit 0a5f7efd04a15748f33452abf8a224112bebffa5
Author: Matthias Plappert <matthiasplappert@me.com>
Date:   Fri Apr 11 18:55:07 2014 +0200

    Fix bad merge.

commit 6932894673fb9a23d3b18a8b0c40214a52b52d9e
Author: Matthias Plappert <matthiasplappert@me.com>
Date:   Fri Apr 11 18:54:03 2014 +0200

    Update examples to use the new cover mode options.