Cross-Validation and Hyper-Parameter Tuning - Week 2

During the second week I was working on tools that allow to check whether a given class has a method with particular name and form (#1020). A usage example can be found above the implementation of the macro 'HAS_METHOD_FORM`.

The method form detection tool will allow for a given machine learning algorithm to automatically extract information such as predictions type, whether it takes DatasetInfo parameter along with data and whether it supports weighted learning. We need to do it to prevent users from passing such information to prospective cross-validation/hyper-parameter tuning modules.

The next step is to facilitate the implemented macro HAS_METHOD_FORM for things mentioned above. I have already started to work on it and plan to send a PR this week.