Add more ignore-files
Add method to load xml-files
Add method to store xml-objects into a file
Fix method store-xml. the xml-obj was missing
Fix utils. An import was missing
Improve get-commits-with-bugzilla. Loading and storing local were removed
Add another method to convert tabular-data into numpy-array
Add method to write a csv-file.
Fix store-as-csv. numpy-records are not iterables, so with this change we convert them into iterables
Refactor get-churn-info-commit.

The loading and storing logic was removed
Fix multiple minor issues