v2.0.0

v2.0.0, 2016-12-05

Dropping support for python 2, bug fixes, minor tidy of code (thanks to
dropping python 2 support!) and progress bars for fingerprinting.

• Dropping support for python 2
  #774
• Fix bug in cache
  #782
• Fix bug in stochastic classification of Random player
  #783
• Fix docstrings in fingerprint
  #784
• Use python 3 function caching
  #775
• More progress bars for fingerprinting
  #778

Here are all the commits for this PR:
v1.19.0...v2.0.0