UiConfResult: parse nested arrays in flashvars

Currently the EmbedPlayer.ReplaceSources [workaround for live-stream playback on iOS](http://html5video.org/wiki/Kaltura_HTML5_Configuration#Directly_play_m3u8_live_stream_sources) does not work.

The original issue is #161.

To see that the workaround does not work, look at the [qunit test](http://html5video.org/kaltura-player/modules/KalturaSupport/tests/ReplaceSources.qunit.html) (lead with HTML5) you will get the error:

    Error: Syntax error, unrecognized expression: [

@sowo successfully traced this error to the fact that the flashvar option was not parsed correctly when the player is initialised inside the iFrame. I hunted around for quite a bit for the correct place to fix this (there were quite a few changes since #161 so this wasn't obvious to me) and finally decided to fix it in UiConfResult.php.

Please not that I am not familiar with the project and I assume that you want to add more sanitation – but for lack of a recursive decode-function (at least I didn't see one) I tested this, for now, by simply using the decoded array without any further checks. Please let me know if you want this to be done differently (and how) – we would love to see this merged since we found no other way to play live streams on iOS.

I also fixed what I assumed to be a typo in the related test case – I hope that assumption was correct.