issue #468 added IsInCSV function to validator.go which takes the given string and file path then firstly attempts to find and open the csv file and secondly tries to find the input string in the csv records and by default if the input string is empty returns true
issue #468 added IsInCSV function to validator.go which takes the given string and file path then firstly attempts to find and open the csv file and secondly tries to find the input string in the csv records and by default if the input string is empty returns true