v3.0.0

v3.0.0, 2017-06-13

A single class for tournaments and Moran processes, sources for all strategies
included in docstrings and internal refactoring,

• The numerous tournament types (prob end, spatial etc) are all now created from
  the Tournament class.:
  #1042
• The graphical moran processes are now created using the MoranProcess class:
  #1043
• Sources for all strategies now included in docstrings:
  #1041
• Remove some unneeded tests:
  #1039
• Further refactoring:
  #1044
  #1040
  #1037

Here are all the commits for this PR:
v2.13.0...v3.0.0