Fix unhandled exception if urlOptions isn't defined
Trigger event on ajax error
Merge pull request #77 from theodorejb/fix-exception-if-urlOptions-is-undefined

Fix unhandled exception if urlOptions isn't defined
Merge pull request #133 from KyorCode/master

Trigger event on ajax error
Update Copyright year
Updated proprietary license for clarity.
Added link in contributing guidelines to contributor license agreement.