PyYAML yaml.load() deprecated

[nb-e]

evolver/evolver/evolver.py

Line 25 in a3213d7

conf = yaml.load(ymlfile)

https://github.com/yaml/pyyaml/wiki/PyYAML-yaml.load(input)-Deprecation

use: yaml.safe_load()

[vhu43]

#75 I believe should fix it in the evolver.py script