Add automatic builds using Travis CI

If a user creates a fieldtrip for lunch, they can set a deadline for when to respond by, which will be relayed to the employees in the notification/preference text.

When an employee onboards, send the phone number a verification code and have the employee input it into the app to make sure that the phone number belongs to them.

Right now we have nothing. At the least we need RSpec. FactoryGirl and other tools would be nice as well.

When you have employees respond with their choices for lunch and click the 'set groups' button on the field trips page, nothing happens. The heroku logs say:

Started GET "/dispatch/set_groups?field_trip_id=1" for 199.87.84.230 at 2014-07-07 22:36:51 +0000
  app/models/field_trip.rb:23:in `block in set_groups!'
NoMethodError (undefined method `employees' for nil:NilClass):
  app/models/event.rb:16:in `full?'
  app/models/field_trip.rb:21:in `each'
  app/models/field_trip.rb:21:in `set_groups!'
  app/controllers/dispatch_controller.rb:41:in `set_groups'
Processing by DispatchController#set_groups as JS
Parameters: {"field_trip_id"=>"1"}
Completed 500 Internal Server Error in 16ms

relations are still broke, may be a reason that twilio callback doesnt work

We ask for an OpenTable URL or phone number when adding a restaurant to your field-trip. Take this URL and make a reservation for the time available, and notify the user if a time is not available.

Right now texts are received fine and parsed, but on the database level the right connections are not being made (preferences for one is not linked to an employee). Based on the current code implemented, get all necessary connections fixed.

Currently, there is a link on the field-trip page to send texts to the employees asking for their preference. One error noticed is that it directs to a missing view after completion, and another is an undefined variable in the route.

When connected to a company calendar, it should check for OOO or other vacation indicators and automatically exclude them from survey.