added document character encoding meta tag to head
- see http://www.whatwg.org/specs/web-apps/current-work/multipage/semantics.html#charset
Added meta tag to force IE to use latest rendering engine (or Google Chrome Frame if installed
- see https://github.com/h5bp/html5-boilerplate/blob/v4.0.2/doc/html.md#x-ua-compatible