As a teacher, so I can keep other teachers up to date on cohort progress, I want to create delivery logs. #34

Tasks

[x] Teacher validated post /log endpoint
[x] Create delete /log/:id endpoint to delete a log
[x] Create post /log/line endpoint to create lines for logs
[x] Create delete /log/line/:id endpoint to delete a line
[x] Add default value of now() to date in DeliveryLog schema
[x] The delivery log author can be retrieved from the request object after validation
[x] Update schema to have delete log cascade down to delete lines as well

Sample request/response can be found in the API-Spec