Added strategy Borufsen/k42r from Axelrod's second tourn

[gaffney2010]

Here are the fingerprints:

[drvinceknight]

I have run the axelrod-fortran test suite with this strategy (as it's deterministic), which tests it against a range of opponents, and it has passed. Coupled with the fingerprints I think it's safe to say this strategy is correctly implemented here.

[drvinceknight]

Could you also update the documentation for the second tournament (docs/reference/overview_of_strategies.rst ) please?

[drvinceknight]

No need for this inline comment.

[drvinceknight]

PEP8: turn % 25

[drvinceknight]

PEP8:

(coops >= 8 and coops <= 17) and self.cc_counts / coops < 0.7:

(I believe there's no need for 1.0 / coops as this is py3+ so will assume float division).

[drvinceknight]

There's a failure on a meta strategy:

======================================================================
FAIL: test_strategy (axelrod.tests.strategies.test_meta.TestMetaMajorityLongMemory)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "C:\projects\axelrod\axelrod\tests\strategies\test_meta.py", line 340, in test_strategy
    expected_actions=actions, seed=1)
  File "C:\projects\axelrod\axelrod\tests\strategies\test_player.py", line 494, in versus_test
    self.assertEqual(match.play(), expected_actions)
AssertionError: Lists differ: [(C, C), (C, D), (D, C), (C, D), (D, C)] != [(C, C), (C, D), (C, C), (C, D), (D, C)]
First differing element 2:
(D, C)
(C, C)
- [(C, C), (C, D), (D, C), (C, D), (D, C)]
+ [(C, C), (C, D), (C, C), (C, D), (D, C)]
----------------------------------------------------------------------

(Just need to modify the expected actions in the test.)

[drvinceknight]

I think we need both tests modified in this case (lines 338 of test_meta) need to be:

~ 338         actions = [(C, C), (C, D), (D, C), (C, D), (D, C)]                                                                                      
  339         self.versus_test(opponent=axelrod.Alternator(),                                                                                         
  340                          expected_actions=actions, seed=1)  

[drvinceknight]

Looks good to me!