Write a function that takes a string and returns true if that string is a palindrome (the same forward and backward) and false if it is not.

isPalindrome("bob");  // true
isPalindrome("baz");  // false

**Extra credit**: Make it so spaces, capital letters, and punctuation don't stop something from being a palindrome. E.g.:
var palindromeString = "I madam, I made radio! So I dared! Am I mad? Am I??"

isPalindrome(palindromeString);  // true