Now possible to configure each group in the categories.yaml. Only color
added at this moment. The order in which the groups are listed is used
by the graph module and will later be used by the report.
Fixes search for vacations. The negative match is now done by groups,
and the key changes from negative_regex to not_in_groups.
Only updates transactions when any travel is assigned. Was previously
updating all uncategorized transactions that reached the travel search.
Regex match now correctly done lower letters to lower letters.
Transaction __repr__ method added and updated along with __str__, to
provide a more clearer output when manually categorizing.
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.
