Update dependencies and year of copyright

* I updated dependencies of this project and fix JSHint settings. Now we don't need to set the ES5 option expressly.
(cf. http://www.jshint.com/blog/2013-05-07/2-0-0/)
* I removed some trailing whitespaces and fix missing semicolons.
* I updated the year of copyright from `2013` to `2013 - 2014`.