STRETCH - Reorganise folders

[trishtracking]

Notes based on what Jack said:

• reorganise folders? Components e.g. all countries-relevant logic in one folder. put models & handlers in one file and then you don't have to write as many tests
• way to organise files
  component/module based
  e.g put all handlers, models, for country related logic, easier to manage in same place
• if there is 1 to 1 relationship between one model and one handler then can only test the handler itself and it will use the model
• can have a index.js within each module folder that only exports required handlers
  so you just import the index in app to access all functions