------ * allow non-integer beam centers * add badges to docs * use sphinx-book-theme for docs
1.7.1
------ * explicit warning for non-monochrome images in `beam_size()` * improve help() messages
1.7.0
------ * fix error in identifying major/minor axes in `beam_size_plot()`
1.6.1
------ * fix deprecation warning for register_cmap * use entire perimeter of background rectangle for tilted background fit * fix sphinx and docstyle warnings
1.6.0
------ * Add `subtract_tilted_background()` * Add M²=1 line to `M2_radius_plot()` * try to autoselect line color on images (still imperfect) * more documentation tweaks
1.5.0
------ * Add M² fitting and plotting * rename `visual_report()` to `beam_size_plot()` * add `plot_size_montage()` * hopefully stable API now * allow any colormap, but default to `gist_ncar` * extensive documentation of M² fitting process