Clean up UDP code more and migrate creds files.
udp-send, not udp-send!
[creds] fixed typos in marc's fix
[testing] create "tests" directory on new project
[frontend] Small UI fix.
[backend+frontend] Sane defaults when no file selected.
[frontend+backend] Fix linter.
[frontend] Fix download.
[frontend] Handle messages correctly in run's deferred.
[frontend] Fix submit.
[frontend] delete is a reserved word in javascript.