Bug 944936 - Correct the org names in space hcards

hcard requires fn but without org it assume it's a person, not a company, and will try to split multiple words into family-name and given-name. But "Mountain View" isn't the correct value for org. This adds a hidden span so the actual org name reads "Mozilla Mountain View" and so on. And now we can also eliminate the meta for schema.org since the h2 has a better machine-readable value.