cipher game v 0.13

reference:
http://covertaction.wikia.com/wiki/Cryptography_%28Mini-Game%29?file=Decoding_EasyCompleted.png


Cipher game based on 1990's Covert Action - program steps below

1.Get plaintext.
2.Cipher the plaintext - simple/crude method below:
    2a.Create two lists with A-Z letters each.
    2b.Shuffle one list.
    2c.Make one dictionary out of them, with letter pairs.
3.Print the plaintext using the substituted letters:
    3a.Take one character, lookup the substituted letter, add the it to the ciphered string.
    3b.Repeat 3a until the whole string has been encrypted.
4.Loop:
    4a.Ask for a letter substitution.
    4b.Display the cipher with chosen substitution underneath.
    4c.Check if the whole message has been deciphered, if yes - exit loop.
5.Display congrats message, exit.