Make reproducible examples

[JosiahParry]

Ask: please create reproducible examples in help documentation and vignettes

Many of your examples in your package are not reproducible. They reference objects which do not exist or are not exported by your package.

For example the example in get_map_layer() is

wi_landcover<- get_map_layer(wi_landcover_url, wis_poly)
plot_layer(wi_landcover, outline_poly = wis_poly)

wi_landcover_url is an internal object that can be accessed like arcpullr:::wi_landcover_url. wis_poly, however, is not even an internal object.

[pfrater]

@JosiahParry Thanks for pointing this out. These examples should be reproducible now as of commit 94698c4.