features:
- bandwidth smearing
- spatial kernel, global or for components
- transfer function
- keeping tracks for plots and figures in oi._dataAxes, oi._dataFig (also for "model", "boot")
graphical tweaks:
- better 2D histograms for bootstrap: control density and better color map
- "b/wl" now as "B/$\lambda$" and with units (thanks Issy!)
bugs:
- baseline and MJD selection was not working properly for multiple ranges
- adapted to leastsquare fit output change for scipy>1.15