This is an implementation of the Vigenere Cipher in Golang. Functionalities include encrypt, decrypt, estimate key length, and guess what the original key is.
Make sure Golang environment is properly set up before testing. 
Vigenere-Encryption
	1) Navigate to “vigenere-encrypt” folder
	2) Type “go install”
	3) Type “vigenere-encrypt <encipherment key> <plaintext filename>”
	4) Output gets sent to stdout
	
Vigenere-Decryption
	1) Navigate to “vigenere-decrypt” folder
	2) Type command “go install”
	3) Type “vigenere-decrypt <decipherment key> <ciphertext filename>”
	4) Output gets sent to stdout
	
Vigenere-Keylength
	1) Navigate to “vigenere-keylength” folder
	2) Type command “go install”
	3) Type “vigenere-keylength <ciphertext filename>”
	4) Guessed keylength gets sent to stdout

Vigenere-Cryptanalyze
	1) Navigate to “vigenere-cryptanalyze folder
	2) Type command “go install”
	3) Type “vigenere-cryptanalyze <ciphertext filename> <key length>
	4) Proposed key gets sent to stdout