EnCryptDe: Scramble data replacing text with key characters

This class can scramble data replacing text with key characters.

It takes a key string with a list of characters and replaces the text of an input string with characters of a second key string in the same position of the input characters in the first key string.

The class can also do the opposite, i.e. take a previously scrambled text string and preforms the inverse operation to build the original string.