Merge branch 'release/0.18.0' into develop
Switch to using Miniconda for install numpy and such
Fix stupid syntax mistake in travis.yml
Fix issue with .travis.yml and conda requirements
Don't install scikit-learn via conda since it's not there for 3.3
Install scikit-learn via conda for 2.7 and via pip for 3.3.
Update generate_predictions to use latest API. Needs unit tests.
Add --use-mirrors to requirements installation step in .travis.yml
Switch to using multiprocessing-compatible logging.
Removing logging config stuff from run_experiment, since we're just using multiprocessing logger now.
Update changelog and version number.
Tweak travis config now that logging is much more verbose.
Merge branch 'release/0.18.1'
Merge branch 'master' of github.com:EducationalTestingService/skll