WebStyle: move of lang and dir attributes to html

* Updates the copyright statement with the current year.

* Removes lang (and xml:lang) from <body> tag. They are already defined
  in the <html> tag and thus inherited. Note that because the document
  uses the XHTML doctype and is served as text/html, both have to be present:
  http://www.w3.org/TR/i18n-html-tech-lang/#ri20040429.092928424

* Moves dir attribute from <body> tag to <html> tag.

Tested-by: Tibor Simko <tibor.simko@cern.ch>
WebStyle: move charset higher in the document

* Moves the charset definition at the top of the <head>.
  "The element containing the character encoding declaration must be
  serialized completely within the first 1024 bytes of the document."
  http://www.w3.org/TR/html5/document-metadata.html#charset

Tested-by: Tibor Simko <tibor.simko@cern.ch>