Changes:
- NBS-Predict is now in v1.0.0-beta2.
- Reorganize and clarify function comments.
- Add link for the sample data.
- Update user MANUAL.
- Add wait/progress bar to the NBS-Predict visualization window.
- Minor change in identifying whether the given data is
classification or regression. Target with more than 3 unique values
are considered as regression problems.
- Add warnings and error messages in case no features survived the
feature selection.
- Refactor a few GUI functions.