iOS - XMLHttpRequest.open basic auth fails - need cross-platform alternative

[shazron]

See: https://github.com/filmaj/Hydra/blob/master/js/hydra.js#L40

The last two parameters to open take in basic auth credentials, but this fails under iOS. What works under iOS is putting the basic auth credentials into the URL itself.
e.g
http://username:password@foo.com/bar/baz

What needs to be tested is if both Android and Blackberry can use this method as well, if they can, we should change to that method. If they can't, we need to branch to iOS specific code (yuck).

Other notes:
Initially Fil sent the Authorization header in Android, but this fails in BB, but xhr.open basic auth method works in both Android and BB.

[shazron]

Have a temporary fix in my fork: https://github.com/shazron/Hydra/blob/iOS-plugins/js/hydra.js#L35-67