Update dependencies and devDependencies

* I updated dependencies and devDependencies of this project.
* I changed expected source map output of the test, to update [grunt-contrib-coffee](https://github.com/gruntjs/grunt-contrib-coffee) to the latest version.
* I fixed JSHint setting. Now there is no need to set the "ES5" option expressly. (cf. http://www.jshint.com/blog/2013-05-07/2-0-0/)