Updated to 4.6, added todo about deprecated function.

TArray<>::FindMatch is deprecated in 4.6.  It is replaced by [IndexOfByPredicate()](https://docs.unrealengine.com/latest/INT/API/Runtime/Core/Containers/TArray/IndexOfByPredicate/index.html).  Unfortunately, I do not possess the required knowledge to make the transition, so I settled for a todo notice in the code.

Updated and compiled for UE4 4.6.0.