Implement InteractionKernels for JIT on SoA

[CKehl]

extend InteractionKernel functionality by making it work in a Kernel-generated, C-jit environment. Benchmark first changes where only the kernel execution is integrated in JIT. If benchmark says neighbourhood parsing is the bottleneck, think about how to fasten it - but avoid recode it all in JIT itself.

(specific subtasks still to be done)