update links to hello world examples

Author: chrisvfritz

src/guide/comparison.md

@@ -284,7 +284,7 @@ Vue is much less opinionated than Angular 2, offering official support for a var
 
 To get started with Vue, all you need is familiarity with HTML and ES5 JavaScript (i.e. plain JavaScript). With these basic skills, you can start building non-trivial applications within less than a day of reading [the guide](/guide).
 
-Angular 2's learning curve is much steeper. Even without TypeScript, their [Quickstart guide](https://angular.io/docs/js/latest/quickstart.html) starts out with an app that uses ES2015 JavaScript, NPM with 18 dependencies, 4 files, and over 3,000 words to explain it all - just to say Hello World. It's an understatement to say that [Vue's Hello World](index.html#Hello-World) is considerably simpler. It's so trivial in fact, that we don't even dedicate a whole page in the guide to it.
+Angular 2's learning curve is much steeper. Even without TypeScript, their [Quickstart guide](https://angular.io/docs/js/latest/quickstart.html) starts out with an app that uses ES2015 JavaScript, NPM with 18 dependencies, 4 files, and over 3,000 words to explain it all - just to say Hello World. It's an understatement to say that [Vue's Hello World](https://jsfiddle.net/chrisvfritz/50wL7mdz/) is considerably simpler. It's so trivial in fact, that we don't even dedicate a whole page in the guide to it.
 
 ## Ember
 

src/guide/index.md

@@ -12,7 +12,7 @@ If you are an experienced frontend developer and want to know how Vue compares t
 
 ## Getting Started
 
-The easiest way to try out Vue.js is using the [JSFiddle Hello World example](https://jsfiddle.net/chrisvfritz/4tpzm3e1/). Feel free to open it in another tab and follow along as we go through some basic examples. If you prefer downloading / installing from a package manager, check out the [Installation](/guide/installation.html) page.
+The easiest way to try out Vue.js is using the [JSFiddle Hello World example](https://jsfiddle.net/chrisvfritz/50wL7mdz/). Feel free to open it in another tab and follow along as we go through some basic examples. If you prefer downloading / installing from a package manager, check out the [Installation](/guide/installation.html) page.
 
 ## Declarative Rendering