stubbing out initial function for points_to_poly
added two example datasets, data just from gbif, #4
data_gbif_1.csv with data from single species, data_gbif_2.csv with data from many species from bounding box search
Merge pull request #5 from ropensci/exdata

added two example datasets
removed queried species in dataset1 from col headers
roxygen docs
Merge remote-tracking branch 'upstream/master'
fleshing out buffer function for concave arg
rgdal as dep