MIT License Copyright (c) 2017, robfordww
#FUNCTIONS
func CalculateChecksum(s string) string
CalculateChecksum takes a string and returns the next two characters
that , when appended to the string, results in a "stringvalue mod 97 ==
1"
func ValidateISIN(isin string) (bool, error)
ValidateISIN takes an ISIN (ISO 6166) as string and validates the
checkdigit
func ValidateLEI(lei string) (bool, error)
ValidateLEI takes a possible LEI string as input and returns a boolean
value error message. For valid LEIs, the bool == true and error == nil,
otherwise bool == false and error != nil
func Validatemod97(s string) bool
Validatemod97 takes a string as parameter and returns true if mod 97 of
the string, interpreted as a number, returns 1. Letters A-Z are
converted to numbers 10-34