Added meta tags and view port

Charset meta tags before title tag (https://github.com/h5bp/html5-boilerplate/blob/master/doc/html.md#the-order-of-meta-tags-and-title)
X-UA-Compatible meta tag (https://github.com/h5bp/html5-boilerplate/blob/master/doc/html.md#x-ua-compatible)
Added Mobile viewport