Arbitrary number of layers
Data for world bounding boxes
Countries and continents bounding boxes
Zoom to bounding boxes
Implement topojson layer
Option to read topojson file
Ignore hidden files in lib
Hide globals
Document package
Document cartographer function
Add news
Document tile_layer()
Add visibility option
Points can be clustered
Document points
Document topojson layer
Change extension of NEWS to avoid CRAN complaints
Fix non-ASCII characters in data
Implement GeoJSON layer
Capitalization of topojson