Remove non-valid meta tag

`<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">` is a completely made up meta tag and should not be included in a valid HTML 5 page.

[W3C Validator](http://validator.w3.org/check?uri=http://buttercoin.github.io/&charset=(detect+automatically)&doctype=Inline&group=0)

Removing this makes the page valid HTML 5.

The best way to actually implement this "feature" is to use HTTP Headers.

`Header set X-UA-Compatible "IE=Edge,chrome=1" env=ie`