Merge branch 'develop' into gh-pages
Update README.md
Added links to project presentation.
Merge branch 'gh-pages'
Merge branch 'develop'
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
Fixed ribbon url in session-modals, added webmaster tools verification, view-on-map bug fix, sold out tickets label, fixed schema.org speaker's image url
Merge remote-tracking branch 'upstream/master' into gh-pages

Conflicts:
	_config.yml
	_includes/tickets.html
	css/main.min.css
Fix typo in URL.
Added information about prizes and awards session.