Update email label

Make it more obvious that your email is your username.
Remove password confirmation fields

Users can always reset their password--don't make them enter it twice.
Fix some lints in User model
Reword ticket request confirmation email

Change wording to emphasize that a ticket request MAY NOT be approved
(i.e. there is no guarantee of approval).
Add previous contribution field to request form

This is intended to capture how a requester contributed last year, so
coordinators can make a better decision about how many tickets to grant.
Require role explanation for all roles except volunteers

This ensure major contributors, coordinators, and uber coordinators all
explain what they're actually doing so ticket coordinators can properly
decide what to do.
Reword password label to indicate it is being created

The initial wording might have been confusing since it suggested a
password already existed. Change it to indicate that the user is
creating a password for the first time.
Clarify that requests must be approved

Indicate that all request approvals will be followed by an email (so
user knows the next steps will appear when they are approved).
Extract address into separate fields

This will ensure people don't screw up their address.
Reorder finanicial assistance and RV camping questions
Remove volunteer_shifts from TicketRequest

This was no longer being used. Remove it.
Split car/RV question into radio buttons

This will allow users to differentiate what kind of camping they are
planning on doing.

This also adds fancier icons to represent these states on the ticket
request.