Forward all 5 arguments to previous window.onerror
Create a trace with error info to show on the UI
Catch errors with Meteor._debug

If zone is available (which should be) catch the error and send it to servers
Send errors from Meteor._debug if no zone

Should send only if a zone is not available (for some reason)
Merge pull request #45 from mnmtanish/format-uncaught

Format uncaught