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Fν was computed by calculating Fλ and then converting to Fν, which led to typical differences in fluxes of typically 1-2% and a bit more for a handful of pathological filters. Now Fν is computed directly and a bit faster. At the same time rather than computing an effective wavelength (which was more a mean wavelength), we compute the pivot wavelength, which is more appropriate when converting between Fν and Fλ.

For more reliability we now save the chi² by blocks. Otherwise it could lead to some crashes when there was more than 1 redshift.

The output directory is a bit of a mess, with it being defined in different places. As we never make use of the possibility of changing it, let's simply hardcode it to out/. It makes filenames slightly easier to read too.

The optionally saved spectra in the pdf_analysis and savefluxes modules were saved in the VO-table format. The most important downside is that it is very slow to write to, which proves to be a major bottleneck in the computing speed. To overcome this issue, we rather save the spectra using the FITS formation. Instead of having one file containing the spectra (including the various components) and the SFH in a single file, now we have one file for the spectra and one file for the SFH.

The luminosity table is also used when plotting Fluxes to access the
various components.

Move the invocation of Matplotlib's Agg backend right after matplotlib's import. Even if it violates PEP8, it avoids some nasty warnings when runing pcigale-plots.

Plot only to λ=50 cm as the models do not extend much further and there is very rarely any observation beyond λ=21 cm.

Display the model fluxes on top of the spectrum. Otherwise the dots can be partially masked by the spectrum.

Correct two issues that caused plots to display an offset spectrum when redshifts were given with more than 2 decimals. First round the redshift to two decimals. Then, rather than recomputing the luminosity distance, let's just take the one from the best models file.

change agn_fritz2006_therm to agn.fritz2006_therm to test if we need to plot the AGN emission (correction of bug)

Large revamp of the SED plotting procedure by Denis and I. Among the main changes: 1. option to plot in mJy in observed frame or un luminosity in rest frame 2. different components are now plotted automatically 3. a logo is now diplayed but can be removed with an option.