Addtest test selectors.
Split up nested function into multiple functions.
Added debug flag.
Added a new 'dump' command.
* Added call to 'dump'
* Updated stock display commands
* Added functions to 'tally-scores'
Updated functions to take optional state data.
Added a utility function to get company name from letter.
Added unit test for new get-company-name function.
Used utility function instead.
More code for shares:
* removed unused company metadata
* updated get-player-shares-with-companies to allow optional parameters
* added add-player-shares function
* added functions for displaying earnings