Correct deap version to 1.0.2.post2

[weixuanfu]

pip install deap==1.0.2
Collecting deap==1.0.2
  Could not find a version that satisfies the requirement deap==1.0.2 (from versions: 0.9.1, 0.9.2, 1.0.0rc3, 1.0.0, 1.0.1, 1.0.2.post2)
No matching distribution found for deap==1.0.2

pip install deap==1.0.2.post2
Collecting deap==1.0.2.post2
Installing collected packages: deap
Successfully installed deap-1.0.2

So I changed 1.0.2 to 1.0.2.post2

Related issue: #434 #433

[coveralls]

Coverage remained the same at 76.769% when pulling e8e30dc on weixuanfu2016:deap_version_issue into 52c305f on rhiever:development.