reworked to_geojson functionality into 3 sep fxns
added magrittr as an import to allow use of pipes
try fix to travis file
try fix to travis file, again
one more time, install gistr this time from github
removed appveyor file
updated readme, removed appveyor file
chagned file names for new fxns
renamed files and fxns #10
fixed up all params to jive :ant:
reworked list_to_geo_list to output appropriate geojson structure, #10
added option to build geometrycollection instead of featurecollection if desired
bumped date
"as" methods for SpatialPoints and SpatialLines.

sp packaged does not have methods for as.SpatialPointsDataFrame.SpatialPoints or as.SpatialLinesDataFrame.SpatialLines (only as.SpatialPolygonsDataFrame.SpatialPolygons). This implements it for Lines and Points
geojson_write methods for SpatialLines and Points
Merge pull request #14 from ateucher/reworkapi

Adding geojson_write methods for SpatialLines, SpatialLinesDataFrame and SpatialPoints
started geojson_read fxn, #15
templated out topojson_read and moved as.loation, #15
as.location fxns work now, #15
geojson_read now works, still needs more testing, #15
Merge pull request #16 from ropensci/reworkapi

merging reworkapi to master