Phrase object (with palindrome detector)

This is a sample NPM module created in Learn Enough JS to Be Dangerous by Michael Hartl

This module can be used as follows:

$ npm install -g rightmeow-palindrome
$ vim test.js
$ let Phrase = require('rightmeow-palindrome')
let napoleonsLament = new Phrase("Able was I, ere I saw Elba.")
console.log(napoleonsLament.isPalindrome())
$ node test.js
true