Merge branch 'hotfix/0.13.1' into develop
Add additional unit tests for id_to_floats and cv_folds_location combination.
Make Learner.from_file check that the pickle actually contains a Learner.
Add a check to _print_fancy_output to ensure that dictionary list is not empty.
Now raise an error if we skipped all of the IDs because nothing in cv_folds or grid_search_folds matched.
Fixed problem with cv_folds and ids_to_floats unit test
No longer use safe_float to convert IDs to floats, since we should expect an exception if the IDs aren't floats.
Add another warning about IDs that can't be converted to floats.
Updated changelog and bumped version to 0.13.2
Merge branch 'release/0.13.2'