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.
That should not be possible because we're moving over ion frames and in one step there can only be just as many new electrons as there are particles in a frame. Given the previous new electron frame would be completely filled that makes the maximum possible value of `electronId` become `2.0 * maxParticlesInFrame`.