Merge branch 'master' into develop
Merge branch 'release/0.26.0' into develop
Merge branch 'master' into develop
Merge branch 'master' into develop
Documentation added for class_weitghts to manage imbalance datasets.
formatting note solved.
Changes json.loads to yaml.load to manage the case for imbalance datasets. e.g. fixed_parameters = [{"class_weight": {0: 1.75, 1: 3.23, 2: 10, 3: 50}}]
Merge pull request #134 from nineil/feature/imbalance_doc

Allow integer keys in fixed_parameters and param_grids
Merge pull request #132 from nineil/imbalance_doc

Documentation added for class_weitghts to manage imbalance datasets.
PEP8 compliant line wrapping in __init__.py
Fix issue where sampler random_state parameter would be overridden.
Organize imports in learner.py
Fix license headers in CLI package. They were still GPL for some reason.
Fix license headers in CLI package. They were still GPL for some reason.
Add missing PyYAML requirement to requirements.txt
Can now convert to libsvm using skll_convert
Add support for reading libsvm files.

- Also fix a weird bug where MegaM input was being sanitized instead of
  output
Fix loads of PEP8 issues in test_skll.py
Add documentatino about libsvm format
Fix some things, but not everything.