Prepare for 7.x-1.0-beta17.

Issue #2824977 by phenaproxima, balsama: [META] Lightning 8.x-1.13

Squashed commit of the following:

commit 826a123
Author: Adam Balsam <[email protected]>
Date:   Wed Nov 16 15:52:53 2016 -0500

    incorporate changelog comments

commit e492f3b
Author: Adam Balsam <[email protected]>
Date:   Wed Nov 16 15:44:26 2016 -0500

    prep for 1.13

Issue #2819643: [META] Lightning 8.x-1.12

Prepare for 7.x-1.0-beta16.

Prepare for 7.x-1.0-beta15.