README: Add a note about deployng and `make reset-db`
Fix a lint warning

Run lint with `lein eastwood`.
Fix the admin credentials in README.md
Fix dev server instructions in README.md
Fetch tastings from the database
Implement a starclicker widget for the ratings
Implement posting tastings

It's very rudimentary.
Remove stray debug prints
Implement the tasting editing page
Store the user when creating the ID
Tasting always has to have coffee and user
Implement form validation for adding tastings
Implement updating tastings
Implement deleting tastings
Do not allow deleting with wrong user