Merge pull request #267 from raphaelquast/dev

update docs version_switcher.json

forward additional kwargs from `m.add_logo` to `plt.imshow`

add "buffer" kwarg to m.set_extent_to_location()

fix crs identification for PlateCarree

remove colorbar parenmt-axis on cb.remove

don't re-position axes in LayoutEditor if shift is pressed

fix updating gridspecs for maps based on SubplotSpecs

make sure webmaps are not drawn if the clip-path is empty

make m.add_background_patch a public method

changes to private methods used to set country-frames

fix m.subplots_adjust must update all gridspcs

fix issues with color-names when adding annotations via the widget

add info on Maps.new_subplot to docs

fix updating country-spine-properties with `m.set_frame()`