Revert "fixed html to html5 doctype (is it right?)"
Revert "fixed html to html5 doctype (is it right?)"

This reverts commit 5cd7f63c7de5627810b73b73c7ae76e95715ff09.

Conflicts:

	apps/pc_frontend/templates/_layout.php

nise-nabe/ppcon-sns,nise-nabe/ppcon-sns