Please mention issue #4 in documentation

[marnen]

Issue #4 describes a major "gotcha". It was suggested 2 years ago that this be put into the README, but that was never done -- and it just cost me lots of debugging time.

I'll submit a pull request for the updated docs if I get a few minutes, but meanwhile I'm opening this issue.

[travisjeffery]

Sure, make the pull request.

[Sequoia]

@marnen Puuuuuuull request! :)

[marnen]

Sorry, been too busy to get to this. Thanks for the reminder: I'll see what I can do.

[travisjeffery]

Actually seems like this is already covered in "Cross domain policy problems under Chrome" section of the README.