Added "Pollux" cipher discussed at BSides Boston

Added the pollux cipher we discussed at BSides Boston and I used in the CTF. I had to add one alternate encoding function to morse to support this.

The cipher and family is described here: http://www.cs.ucf.edu/~gworley/files/pollux_and_frac_morse.txt

More could be done with the other fractional morse ciphers described in that paper.