Perfer to use <meta charset="utf8">.

Both are valid in HTML5, and both are valid in major browsers, so we
choose shorter version.

And move charset before title, because <title> might contain multibyte
string.

Ref: https://code.google.com/p/doctype-mirror/wiki/MetaCharsetAttribute
In HTML5, we don't need xml-style close tag.
Merge pull request #247 from gslin/master

Prefer HTML5 syntax.