Implementation of Caverphone 1 algorithm

Implementation of the DoubleMetaphone algorithm (#20)

* Implementation of the DoubleMetaphone algorithm

* Update README.md

* Update __init__.py

Merge pull request #18 from linuxgoose/1-add-nysiis-algorithm

Addition of NYSIIS

Addition of NYSIIS

#1

Merge branch 'master' into 7-soundex-incorrect-calculation

Added Levenshtein, Hamming distance, removed half-done algorithms.

Updated README with instructions of use.
Added the skeleton for DaitchMokotoff.

Algorithm implementation:
* Added Soundex, Fuzzy Soundex, Metaphone, Lein, MRA.
* Added tests for every algorithm.
* Updated Licence.
* Added and tested some utils.

First commit.