Re-Introducing HappyPack (#4669)

* Updating Dev Dependencies (minor version updates)

* Re-introduce HappyPack

* Added Yarn Lock file

* Use HappyPack

* Linting

* Delete yarn lock file

js/src/dapps/tokenreg/Chip/chip.js

@@ -18,7 +18,7 @@ import React, { Component, PropTypes } from 'react';
 
 import { Chip } from 'material-ui';
 
-import IdentityIcon from '../IdentityIcon' ;
+import IdentityIcon from '../IdentityIcon';
 
 import styles from './chip.css';