Put tools back on Conda

[Aylr]

Note you may run into trouble if dependencies are not built as conda packages and available in conda-forge. So, you may have to:

• build sklearn yourself conda skeleton pypi sklearn
• build and install imbalanced-learn yourself conda install -c glemaitre imbalanced-learn
• add the channel that imbalanced-learn is found when building: conda build --python 3.4 healthcareai -c glemaitre
• Note we are utilizing some handy syntax introduced in 3.5