Primarily fixing a number of checkbox/radio issues including: #2149123: Visually style checkboxes and radios on focus #2153101: Some checkboxes are missing in IE11
Also fixes for updated Views Megarow module and Chosen library.
Slightly modified version for Drupalcon Austin so that we can start tracking data.
Original state of drupal devops survey questions.
Issue #2249413: Error saving new node without schedule by mvwensen: Fixed bug with error reporting when no schedule is selected for new nodes
Updates detection of the Bitpay php-client library to match changes committed at https://github.com/bitpay/php-client.