Bank records transactions for paid-out interest
Refactored account and person specs
Transaction initialization doesn't need owner id; gets it from account
Cleans up bank spec
Removed old method
Named rake task
Huge refactor to get account repo to follow Repository design pattern
Renames account repo file to with memory repo prefix
Storing people now follows Repository design pattern
Registers memory person repo before firing up console
Initializes person with a nil id
Transaction no longer stores owner_id; get to owner through account
Transaction log follows Repository design pattern