Make a mobster database if one doesn't already exist
Fixes newline bug when adding mobsters
Allow adding multiple mobsters in one call
CLI interface works with multiple names
Allow multiple mobsters to be removed at once
Refactored remove mobster method
Refactored remove_mobster to use just in-memory mobsters list and introduced a file_syncing method
More on the TODO
Update changelog to reflect new ability to add/remove multiple mobsters