easyest/jquery-cascading-dropdown — pull request #1 by easyest (2014-12-14 10:40:15+00:00)
Title: Add ability to accept and display optgroups

Added ability to parse and create option groups in the select
Updated the README to explain the JSON object expected for option groups
Added a demo item (example5) to show this functionallity
Added call in ajax-mocks that groups the resolutions for the demo