updating dates
hiding some things
updating sponsorship prospectus to reflect 2014 info

Conflicts:
	public/files/True North PHP Sponsorship Prospectus.pdf
	sponsorship_prospectus.md
removing old logos
opening up ticket sales
Merge branch 'ticket_sales_2014'
Also, updating to 2014 schedule

Conflicts:
	header.php
	navigation.php
	public/css/schedule.css
	public/index.php
	public/sponsors.php
	public/tickets.php
	public/venue.php
	schedule.php
updating viewtalks to give a nice error page when the speaker is not found
removing speakers from last year who are not returning this year
adding new speaker data and schedule