Add support for stacktraces on most errors

In Safari, Firefox, Opera, and IE 11
comment changed dist file...
Add list of missing async entry points
Merge master in
Merge master
Cleaner approach to getting exception in onerror
Fix loading on IE6/7

You can't set properties on window.setTimeout (nor call
window.setTimeout.call)
Add current dom node to event
Remove now-absent concat task
Tidy up and polish

Works fully in IE 10/11, Firefox/Safari/Opera/Chrome.

In IE 6/7/8: Can get fake bracktraces (arguments.callee.caller). Can't get events.
In IE 9: Can't get backtraces (fake or not). Can get events.
In Firefox 3.5: Can't get events or stack-traces automatically.
fix test runner
Add a smoke test
Release should update version
J SHINT
use uglify to comment out testing code
test request for BUGSNAG_TESTING only
byte removal
Don't polyFill if autonotify is false
Add stats task
Make bump::{*} bump version everywhere