before_filter -> before_action
Add a phone_number class

Normalizes phone numbers for Tropo
require_login! -> require_admin_login!
Participants now have real PhoneNumbers
Add authentication to participants

Also fix a busted fixture
Add silly skeletal ppt login page
Add a way to mock twilio calls

because I don't want my test harness sending
test messages
Add a twilio number fixture
Actually let us try and send a login code message

Yaaaaay but doesn't quiiiite do it yet
Change base welcome text