added PointsPolyIntersect and formatAbsent functions
removed lines that assigned 'time' as 12:00:00 and now time comes from actual time listed in absent file
working to update sampling of eBird presence and absence data. Wrote new/adapted Sarah's existing code to subset presence data by time as it relates to migration times defined in Supp et al ecopshere paper. Wrote functions and lines for spatial subsetting by flyway.