Added Almost Human, Arrow, and Continuum.

Voted for Chuck, Person of Interest, and The Walking Dead.
Removed Arrow from proposals.js

Turns out it was already present in data.js!
Merge pull request #225 from scryptonite/master

Added Almost Human and Continuum
Merge pull request #229 from michalbe/master

Merge pull request #225 from scryptonite/master