Draft: first version of the new SPICE module
First version of the new SPICE module. This module is a first step to link physics simulations (Allpix2) and integrated circuits (IC) simulations (Spectre, Spice, etc.). The module uses the current pulse from the [PulseTransfer] module. It also needs a netlist (file describing an IC and readable by an IC simulator, ie. Spectre, Spice) as input. The module associates the current pulse (time + current) to a current source, which is connected to an IC (a front-end) and writes a new netlist, directly useable by an IC simulator. One netlist is written by event, each pixel fired corresponds to a current source, and one front-end is connected to each current source.