Investments are not normally reported on the receiving end in
transaction logs, and they introduce too much visual noise in monthly
expense graphs. As such they will later appear in relevant invesment
graphs, but are removed for now from the available choices.
`categorize_data` is the new entry for data categorization and receives
a DBManager. Contains the categorizing logic.
Categorizer configuration now done solely from categories.yaml file.
Ancilliary database methods added to DBManager required for categorizing
transactions.
Adds categorize to command line options.
Removes obsolete restart options and method from runnable.py.
Fixes parse and categorize method, now take cmd line arguments and
`DBManager`.
Removes obsolete tools.py, all functions already rewritten in relevant
modules.
Updated categories.yaml with new keys.
