Implement meny sidebar menu

- Also moved header and footer into includes
Merge branch 'updates' of https://github.com/CANHEIT/CANHEIT-2013 into updates

Conflicts:
	about/exceptional-ideas.html
	about/index.html
	index.html
	js/menu.js
	register/index.html
	register/next-steps/index.html
	speakers-toolkit/index.html
	templates/program/index.twig
	templates/program/session.twig
	templates/sponsors/index.twig
	templates/sponsors/sponsor.twig
	templates/your-stay/accommodations/accommodation.twig
	templates/your-stay/accommodations/index.twig
	templates/your-stay/attractions/attraction.twig
	templates/your-stay/attractions/index.twig
	templates/your-stay/getting-here/getting-here.twig
	templates/your-stay/getting-here/index.twig
	templates/your-stay/local-eats/index.twig
	templates/your-stay/local-eats/local-eat.twig
	templates/your-stay/nightlife/index.twig
	templates/your-stay/nightlife/nightlife.twig
	templates/your-stay/uottawa-campus/index.twig
	templates/your-stay/uottawa-campus/uottawa-campus.twig
	why-attend/index.html
	why-attend/virtually/index.html
	your-stay/index.html