More test examples
Polygon support!
Fix map example
More examples
Add support for Line, Lines, SpatialLines, SpatialLinesDataFrame

In our package these can be used interchangably with polygons.
Handle holes correctly
Execute commands in order
add the sp:: qualifier
correct Rd
setView(lng, lat) instead of setView(c(lat, lng))
Merge pull request #13 from rstudio/feature/legit-polygons

Polygon support