JS only!

Made a couple quick changes to remove the dependency on PHP so that this can be ran strictly on the client-side.

* Renamed the static `.php` files to `.html`
* Removed unused `functions.js`
* Ported the point calculator logic from `functions.php` into `points.js`
* Consolidated all the JS logic within `points.js`
* Linked to the google hosted jquery (since the referenced jquery wasn't included in the repo)
* Added a README