Update .gitignore
Deleted _site files
Update .gitignore
Merge remote-tracking branch 'TuT-theme/master' into gh-pages

Conflicts:
	_site/2012/12/20/hello-world.html
	_site/2012/12/20/we're-ready-for-action.html
	_site/2012/12/29/great-news.html
	_site/2013/02/07/wow-wow-wow.html
	_site/2013/02/25/tomorrow's-our-first-hacknight.html
	_site/2013/03/19/sample-problems-for-interaction-night.html
	_site/about/index.html
	_site/blog/index.html
	_site/contact/index.html
	_site/index.html
	_site/sponsors/index.html