[TODO]{.todo .TODO} Tern.js with Atom.
[TODO]{.todo .TODO} Object spread syntax proposed for ES7.
[TODO]{.todo .TODO} if (typeof myvar = 'undefined') …
[TODO]{.todo .TODO} copy object and set with Object.assign({}, state, {property: newValue}).
[TODO]{.todo .TODO} Use ES6 computed property syntax.
[TODO]{.todo .TODO} ES6 syntax: import * as reducers from './reducers'.