Optimised web fonts

* Base64-encoded Google Fonts WOFF files and added them to a new file,
webfonts.css.
* Minified webfonts.css to webfonts.min.css.
* Deferred load of webfonts.min.css by using Horia Dragomir’s defer
script: https://gist.github.com/hdragomir/8f00ce2581795fd7b1b7
* Minified JavaScript snippets at the end of the HTML file.
* Removed Google Fonts links from <head>.