Replace external jquery with embedded Zepto.

As stated before I was unhappy with the dependency on an external module, as it required a internet connection for proper loading. I replaced the external jquery with an embedded version of [zepto](https://github.com/madrobby/zepto), which is not only now local but also much smaller (as it only loads what we need: effects and event handlers)

Zepto was built with:

    MODULES="zepto event fx fx_methods" npm run-script dist

Additional module: https://github.com/Ilycite/zepto-slide-transition/

Closes #2