Factor out functionality to Axelrod (#52)

Update test

Update requirements.txt and setup.py

Attempt to fix travis

Bump Axelrod version to latest version with ordered actions.

Adds sorting back to lookup_evolve __repr__

Represent initial actions as strings in LookerUpParams __repr__

fix crossover_tables and __repr__

Fix usage docs

Remove commented lines from evolve Lookerup

Fix evolve Lookerup

Implement genetic algorithm for gambler (#48)

Change mutation_rate -> mutation_probability.

Release v0.0.8

Adding cycler (#45)