Now that Hunchentoot is serving the Elm frontend, Elm needs to connect
to Gemma at a relative path.
Side note: It would be useful if the frontend displayed errors that
happened :sun:
Adds a clickable area to the cards that will inform the backend of a
task being completed.
This of course still looks completely terrible because I don't really
know how frontend works.
The idea is that every task should be shown as an MDL "card" and have
some sort of associated action (probably more than just a click, but
that I'll look at ...).
Tasks are coloured based on their current "urgency".
