Fixes 6: Made sure that empty strings are mapped correctly.
0.2.2
Fixes 5: Made sure that ensure_cols method also considers index name before adding missing columns.
0.2.1
Bug 4: Fixed issue with duplicate columns when calling remap with ensure_cols=True.
0.2.0
Issue 2: Added functionality to ensure that certain columns exist on data frame even if it is empty. Issue 3: Added ability to remove all columns that are not in a specific data set or any dataset.
0.1.1
Fixes 1 More options to customise the Jupyter notebook output required