OS-6 Adds response data to on error events.
Merge pull request #72 from aaronchilcott/OS-6

OS-6 Adds response data to on error events.
OS-6 Adds additional check to prevent 500 errors from causing the
response body to be read
Merge pull request #73 from aaronchilcott/OS-6

OS-6 OS-6 Prevents 500 errors from causing the response body to be read
Update build.
Knockout's notifySubscribers() requires a value passed in.