Adds a new record to document containing the values in objs

Property definitions

csv $ CsvDocument :: add_record
	# Adds a new record to document containing the values in `objs`
	fun add_record(objs: Object...) do
		var ln = new Array[String].with_capacity(objs.length)
		for i in objs do ln.add(i.to_s)
		records.add ln
	end
lib/csv/csv.nit:131,2--136,4