Update README.md fixed Mocha link

Mocha link was a 404.

[close rmurphey#186]

Author: uxfed

README.md

@@ -66,7 +66,7 @@ keep them up to date.
 
 ## I hate \<some technology you've chosen\>
 
-This repo uses [Mocha](http://visionmedia.github.com/mocha/) and
+This repo uses [Mocha](https://github.com/mochajs/mocha) and
 [Chai](http://chaijs.com/) for the tests themselves. It uses the BDD style for authoring tests.
 If this doesn't suit you, please fork away, or, better, submit a pull request that lets
 this be more flexible than it currently is.