Adding default "section" to global block elements list.
Adding default "section" to global block elements list.

wastemobile/HTMLBook,macmillanpublishers/HTMLBook,macmillanpublishers/HTMLBook,gitenberg-dev/HTMLBook,macmillanpublishers/HTMLBook,oreillymedia/HTMLBook,wastemobile/HTMLBook,gitenberg-dev/HTMLBook,oreillymedia/HTMLBook,mushroomgithub/HTMLBook,oreillymedia/HTMLBook,mushroomgithub/HTMLBook,gitenberg-dev/HTMLBook,mushroomgithub/HTMLBook