Atlas references

[WalterRobin]

Critical approach to atlas making -> http://subjectiveatlas.info/atlas/

[clemsos]

@WalterRobin also I wrote that on this topic https://theatlasofdata.earth/what-is-an-atlas

[clemsos]

@clemsos maybe we should find a better way to maintain a list of atlases...

[clemsos]

see #45 for reference