update index.html template per upstream deck.js boilerplate.html changes

A few small html changes to reflect https://github.com/imakewebthings/deck.js/blob/master/boilerplate.html , notably removing the version number from jquery, which was causing jquery not to load, as well as removing hash, as per https://github.com/imakewebthings/deck.js/commit/657ac47e860458894bcc4fbc7bbd3424b31cbf0c .