Adding Kasiski test and Index of Coincidence code
Adding IC test to KeywordLengthTests
Added Vignere Cipher encryption code
Added decrypt function for Vignere Cipher as well as another function handy for decrypting when the keyword is unknown.
Added a function to VignereCipher to guess at the keyword letters given a length.
Updating main README
Adding encoding function for an Exponential Cipher
Adding a PrimeMath.py. Only has an isPrime function for now, but I'm sure I'll think of more things to add later.
Added init files to treat folders as Python modules.
Tried to modulize the functions a bit more and added decryption function.
Taking out the definitions from the py files and putting them in respective READMEs.
Transferred all monoalphabetic information to its README.
Format fix in Monoalphabetic README.
Format fix in Monoalphabetic README.
Format fix in Monoalphabetic README. It appears PyCharm likes to delete spaces at the end of lines.
Reformating README to distinguish between ciphers and other definitions.
Main README now shows which ciphers are complete, and Monoalphabetic README now has better navigation.
Creating the Polyalphabetic README and correcting minor formatting problem with main README.  Let's hope those tables work.
Taking advantage of tables to better format examples.
Attempting to fix table issues in Monoalphabetic README.