adds debate model

app/models/debate.rb

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+class Debate < ActiveRecord::Base
+end

db/migrate/20150715190041_create_debates.rb

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+class CreateDebates < ActiveRecord::Migration
+  def change
+    create_table :debates do |t|
+      t.string :title
+      t.text :description
+      t.string :external_link
+      t.integer :author_id
+
+      t.timestamps null: false
+    end
+  end
+end

db/schema.rb

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+# encoding: UTF-8
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 20150715190041) do
+
+  create_table "debates", force: :cascade do |t|
+    t.string   "title"
+    t.text     "description"
+    t.string   "external_link"
+    t.integer  "author_id"
+    t.datetime "created_at",    null: false
+    t.datetime "updated_at",    null: false
+  end
+
+end

spec/models/debate_spec.rb

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+require 'rails_helper'
+
+RSpec.describe Debate, type: :model do
+  pending "add some examples to (or delete) #{__FILE__}"
+end