Initial xdomainrequest support

No filtering support
Indentation fixes
XDomainRequest has content-type request header, even if always set to text/plain
XDomainRequest should throw error if setResponseBody called before request has been sent
Add FakeXDomainRequest tests
Style cleanup
Update test names s/onreadystatechange/readyStateCHange
Fix reponseText handling of simulatetimeout() and ontimeout event
XDR: Add tests for fake XDR exposing
Build script should include xdr_ie.js
Add XDR tests to main suite
Merge branch 'jsok-xdomainrequest'