Merge pull request #14 from ruanmer/master

fix error when module is undefined; close #13
Adding Coveralls.io using grunt-coveralls pkg
updating Readme
Adding JSCS

using https://github.com/gustavohenke/grunt-jscs-checker
updating dependencies
Gruntfile: adding force option to Coveralls task
Package.json: setting files dir

plus a keyword
Package.json: jscs on npm scripts