Merge Ionization into Dev to see changes

The code is compiling but once I try to run it, I am receiving a SegFault without much other comment. 
That happens when I use CUDA 5.5 or 6.0. If I use 6.5 it tells me that it cannot find a CUDA capable device.
What do you mean? `GetCharge()` already does what you are describing. `GetChargeState()` does not exist, yet. I just wondered if introducing it would be of any further use, thus justifying its existence.