export(get_location)
export(create_map)
export(add_markers)
export(add_links)
export(add_entities)
export(add_periods)
export(add_description)
export(add_tutorial)
export(list_providers)
S3method(print, evolMap)
S3method(plot, evolMap)
importFrom(jsonlite, fromJSON, toJSON)
importFrom(utils, browseURL, head, URLencode)
importFrom(grDevices, col2rgb, rgb)
