Update QtWebKit subproject
Simplify Env code by reusing QProcessEnvironment.

This gets rid of the custom parse code and slims down the API.
Merge branch 'kdab-qt5' into javabindings
Also setup common stuff for Phantom in library usage.

We now also install the event handler there. Also, Config's
setPrintDebugMessages now propagates to Utils::printDebugMessages
directly. Otherwise, setting it after Phantom was instantiated has
no effect.

Finally, the SSL socket magic is now also done for the pure library
usage.