jQuery 2.x compatibility issue

[sserdyuk]

First of all, thank you for making this available. We are just starting to use it and it looks very promising.

I have attempted to migrate to jQuery 2.x and discovered that the xhr feature is not compatible with the new version. I have attempted to fix it but gave up.

First, it throws an error because feature's proxy is limited to 3 call parameters and jQuery sends 5, but that was easy to fix by adding more "if" statements in that block. Once I fixed that though, the proxy stopped erroring but didn't start to work. The effect was that .done and .fail callbacks never fired after the request completed.

Hope this helps.