Move read_table() and Counter() to a top-level utils directory as they are used both by pcigale and pcigale-plots.

Optimise the retrieval of a luminosity component as cigale has not supported having several modules of the same name in many years now.

The computation of all the cosmology-dependent quantities has been consolidated in pcigale/utils/cosmology.py and optimised. This leads to a slightly faster startup, in particular when there are many objects to fit, and it makes it easier to change the cosmology.

Create a pcigale/utils directory to store various utility functions in preparation for the inclusion of cosmology utility functions. Move pcigale/utils.py to pcigale/utils/io.py, which contains only read_table() and adapt the rest of the code accordingly.

Now that the minimum python version is 3.6, store integers as integers rather than as floats in SharedArray.

Speedup the computation of the weighted means and standard deviation by normalising the likelihhod, simplifying the computation

Maximise the CPU cache hit rate with computing the χ² by storing contiguously all the models at a given redshift.

When determining the fluxes to compute, make sure we only try to access the list of bands to analyse when that parameter is actually present in the analysis module.

Implement the possibility of specifying a list of bands for which to carry out a Bayesian flux estimate.

Improve the presentation of the sanity check and only do as at the end of the run so that sporadic messages are not displayed in individual blocks.

Ensure that best models are properly computed when models are computed by blocks and that no fit could be made in one or more blocks.

As we modify the sed object, make a deep copy so we do not accidentally alter the model in the cache. These models should probably be made read-only, if it is not too costly in terms of performance.

Some lines have been made slightly thicker in SED plots so the different components are more visible

The lines linking the different bands in the residual SED plot have been eliminated to improve the readability

The uncertainties on the SED plots now correspond only to 1σ rather than 3σ so they do not appear exceedingly large