Add 'first time speaking' checkbox to proposal form

* Add migration
* Related schema update
* Add checkbox to proposal form

Similar to the previous commit, this will need additional
modifications for the data to be displayed.

app/views/proposal/new.html.haml

@@ -59,6 +59,8 @@
 
               = f.input :diversity, as: :boolean, label: 'I identify as a member of a group that is historically under-represented in technology'
 
+              = f.input :first_time, as: :boolean, label: 'This will be my first time speaking at a conference'
+
               = f.input :require_registration, label: 'Require participants to register to your event'
 
               %p.text-right

db/migrate/20170614025428_add_first_time_to_events.rb

@@ -0,0 +1,5 @@
+class AddFirstTimeToEvents < ActiveRecord::Migration
+  def change
+    add_column :events, :first_time, :boolean, default: false
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170613224853) do
+ActiveRecord::Schema.define(version: 20170614025428) do
 
   create_table "ahoy_events", force: :cascade do |t|
     t.uuid     "visit_id",   limit: 16
@@ -233,6 +233,7 @@
     t.integer  "program_id"
     t.integer  "max_attendees"
     t.boolean  "diversity",                    default: false
+    t.boolean  "first_time",                   default: false
   end
 
   create_table "events_registrations", force: :cascade do |t|