PredictTheNumber-4-37-2014 Added GetTargetNumberInString
Apparently we have to go with a simplified version of this project since doing it for strings of length over size Int32.MaxValue took over 30 minutes for one test (I stopped the test), and the other way resulted in an OutOfMemoryException.

So we're only going to be doing this one for strings of up to length Int32.MaxValue.

All tests green.