Add Airbrake

Big night tonight!
Add team number to login page

For coaches that control multiple teams it might be confusing which
password goes to which team on the login page. This commit adds the team
number to the login page so that it is really clear which team you're
logging in as.
Make Schedule#show display times in correct time zone
Update Schedule PDF to use proper logos and teams
Create "All PDFs" download option

This refactors the PDF download options for each event into a much more
efficient way that allows downloading multiple events simultaneously.
Redirect to the correct URL when a non-admin tries to view the PDF
Fix the ability to publish tournament scores
Send emails to the proper location
Make the default sign-up email a bit more helpful
Add ability for tournaments to be in Division A
Fix CSV score download
Skip divisions without events & teams in CSV download
Add the ability to specify the team number format
Ensure the proper choice is used for append_division_to_team_number
Fix the migration for team name display
Correct the spelling of eighth at the award ceremony
Upgrade to heroku-cedar stack

And add a tiny fix to the welcome email.
Move sqlite3 to development gem bundle
Don't initialize on precompile (for Heroku)
Add unicorn! :D