added in I-77 motorway_juction tags, oneway tags and bridge
changed road to tertiary, corrected name_1 tag, reviewed
added a boundary=civil to public area
changed road tag from ref to name
added source tag to Saluda Shoals park
tagged St. Andrews Rd and tertiary
undated to Harbison State Forest from tracking survey
improved SC I-20 wecolme center
added oneway tag to motorway_link
added I-77 motorway_junction tags and exit ref tags
corrected Saluda Shoals Park ways
added Saluda Shoals Park, Irmo SC
moved Gilbert High football field to proper location
added I-20 motorway_junction tags and oneway tags to exit ramps. added bridge on road over I20