Restart for Plugin BinEnergyParticles

The old text file is opened, filtered for previous values and pre-pended to the new file during restarts.

The old implementation made a manual copy-and-join of the output necessary (see note <sup>1</sup> in the [wiki](https://github.com/ComputationalRadiationPhysics/picongpu/wiki/PIConGPU-Plugins)).

### To Do

- [ ] perform a run time test
you should check in `pluginLoad` that the user set `numBins` to something > 0, otherwise, you might run into `div by 0` exceptions