Add some screenshots of the geospatial mapping features to the readme

[trashbirdecology]

Hi -- just came across this app and am curious to see what it can do. Adding a screenshot of it in action would be brilliant.

[stellasia]

Hi @trashbirdecology ! Thanks for the suggestion, will do!

In the meantime, you can watch the following video: https://www.youtube.com/watch?v=rhBG_crLMRM It was recorded with the first version of neomap, some functionalities were added later on (cluster or polyline rendering or neo4j-spatial integration), but the way of using it has not changed.