Specify the character encoding using meta charset.

Use the shorter `<meta charset="utf-8">` to specify
the character encoding instead of the longer
`<meta http-equiv="content-type" content="text/html; charset=utf-8"/>`.

For more in-depth information about how the character
encoding of HTML documents is determined, please see:
http://blog.whatwg.org/the-road-to-html-5-character-encoding.
Merge pull request #1 from alrra/meta-charset

Specify the character encoding using  `<meta charset="utf-8">`