too early "true" with `doneStep`

[Konstantin Kudryashov]

I'm using API calls to proxy to run PHP Mink and SahiClient. And when i'm running commands, that needs some time to get executed - i use `setStep` and looped `doneStep` calls. This way, Sahi should return "true" for `doneStep` call only if command were totally executed (i.e. page were loaded). But in iOS this doesn't works. `doneStep` return some "false" values on first iterations, so it seems work, but it returns "true" before actual page were loaded, so it works wrong. Tested on iOS simulator.

With regard, Konstantin Kudryashov.