removed togeojson fxn, new output list format for bison_solr and bison_tax, bison_data parsing improved for bison_occ s3 class
fixed up a bunch of docuemntation errors, etc., almost passes check
moved vignette out of vignettes folder, put in dummy file
updated readme with new stuff, added missing ignore files
updated description file, small change to bisonmap fxn docs