v0.6.1

openairmaps 0.6.1

Fixed issue with polar marker maps (e.g., polarMap()) and the generic addPolarMarkers() function where lat/lon info in the Southern Hemisphere would misalign markers. Hat tip to Deanna Tuxford and James/"@jenright-git" for noticing this issue.

Fixed an issue with networkMap() where control = "variable" would fail to show all pollutants.

Functions now use Google's "turbo" colour palette rather than "jet" by default. More about this palette and the advantages of using it over "jet" can be read at https://ai.googleblog.com/2019/08/turbo-improved-rainbow-colormap-for.html.