TPAC: Let there be HTML5

Stop living the lie that we're pretending to be XHTML Transitional and
embrace HTML5. And save a whole bunch of bytes right off the bat!

Also, use a valid language/locale identifier--we need hyphens instead of
underscores.

Signed-off-by: Dan Scott <dan@coffeecode.net>
Signed-off-by: Ben Shum <bshum@biblio.org>
TPAC: Avoid leading / trailing space on pages

Use the [%- -%] whitespace-chomping directives to remove the leading
space on pages.

Signed-off-by: Dan Scott <dan@coffeecode.net>
Signed-off-by: Ben Shum <bshum@biblio.org>