EventLoaderTimepix4

Written an EventLoaderTimepix4 that reads in the raw data produced by the TPX4 ASIC, decodes all relevant physical parameters, and provides them as pixels to the corryvreckan clipboard.

Eventloader structure was originally based on EventLoaderTimepix3 for an easier start in the general structure and then adapted from there to get it into a working state.

A full 8 layer tpx4 telescope was aligned with the system and reasonable results were achieved in terms of DUT investigation, residuals etc.

Note: While fully functional for a generalized purpose. For best timing performance some work is still required, namely the reading in of external calibration files for Timewalk and VCO corrections. I am currently working on implementing these corrections. Without them, the best timing that can be achieved is on the order of hundreds of picoseconds.