Issue #104: Backport Drupal 8 dialog API.
Issue #57: Upgrade jQuery to 1.11 and jQuery UI to 1.10.4.
Merge pull request #203 from quicksketch/57/upgrade-jquery

Issue #57: Upgrade jQuery to 1.11 and jQuery UI to 1.10.4.
Merge pull request #202 from quicksketch/104/dialog-api

Issue #104: Backport Drupal 8 dialog API.
Issue #2145077 by TR: Fix spelling errors in D7 tests and comments.