Demarcate start and end of assignments with arrows
Demarcate start and end of assignments with arrows

Closes #10.

Still can't decide if it's worth writing view specs for this app.

umts/garrulous-garbanzo,umts/screaming-dinosaur,umts/garrulous-garbanzo,umts/garrulous-garbanzo,umts/screaming-dinosaur,umts/screaming-dinosaur