EventLoaderATLASpix: removed 'finalise()' function which is not needed anymore + related unused variables

EventLoaderATLASpix: moved masking pixels a bit earlier and recovered correct filling of pixel ToT BEFORE correction histogram

EventLoaderATLASpix: moving all per-pixel histograms into 'read_caribou_data' to avoid another loop over pixels vector

EventLoaderATLASpix: updated doxygen description for 'read_caribou_data' and remove old commented line

EventLoaderATLASpix: 'read_caribou_data()' now returns false when reaching end-of-file and true otherwise, adjust logic in run() accordingly

EventLoaderATLASpix: removed block in initialise() which does the 'skip before T0' which is now done in 'read_caribou_data()' as well

EventLoaderATLASpix: copying over code block from ATLASpix Raw Decoder in EUDAQ2 and adjusting variable names

Follow-up on MR !114: Improve Clustering

See merge request !165

EventLoaderATLASpix: set 'buffer_depth=1000' by default and throw error when buffer_depth is smaller than 1

Improve Clustering - allow arithmetic or charge-weighted mean for cluster centre

See merge request corryvreckan/corryvreckan!114

ClusteringSpatial: same implementation for charge-weighted centre-of-gravity + fall-back to arithmetic mean as used in Clustering4D

Docker: add EUDAQ2 to the dependencies and build the event loader

See merge request corryvreckan/corryvreckan!163

EventLoaderATLASpix: implemented filling of priority queue until buffer_depth is reached and read from it until we're after the current clipboard event

Renaming all pixel multiplicity plots in event loader type modules for consistency

Closes #71

See merge request corryvreckan/corryvreckan!159

Clustering4D: implemented corrected logic to make sure we get the correct cluster position when one of the pixels has zero charge

Clustering4D/README: added new plot clusterMultiplicity

See merge request corryvreckan/corryvreckan!160

Adding plot for cluster multiplicity (clusters per plane per event)

See merge request corryvreckan/corryvreckan!158