EducationalTestingService/rsmtool: Version 5.7

What's new?

• Update Python to v3.6, pandas to v0.22.0 and SKLL to v1.5. This required minor changes to the code and updates to some of the test files.
• The conda installation command has changed. See the new command here.

• The evaluation_by_group notebook in addition to bar plots now includes a table showing the main metrics for each subgroup.
• When using the RSMTool API, it is now possible to specify a tolerance keyword argument for trim method. Read more here.

• The differential feature functioning (DFF) plots are now correctly generated using preprocessed feature values. In the previous version, they incorrectly used raw feature values.
• In v0.19.0 of scikit-learn, the implementation of explained_variance_ in their PCA implementation underwent some bugfixes. Due to this, the results of PCA analyses no longer match those produced by the previous versions of RSMTool and had to be changed.

• Updated the utility script update_skll_model.py to make it compatible with SKLL v.1.5.
• Minor updates for the documentation.