Merge pull request #1 from bgruening/master

Add IPython Notebook example to the readme
renamed main classese to vectorizer. updated notebooks
updated notebooks
Update README.md
Update README.md
add wrapper around apply_async to enable multiprocessing
fix the parallel version of eden string, it is not activated by default
Merge branch 'master' of https://github.com/fabriziocosta/pyEDeN