Add widget feeds to homepage

Note there is some funkiness going on with class loadings
Had to create a `feed` and `widget_feed` table even though in this
first version the Widget::Feed includes only uses ActiveModel instead
of ActiveRecord, otherwise some specs failed

We’ll figure it out and clean up 😌

db/dev_seeds/settings.rb

@@ -63,4 +63,8 @@ section "Creating Settings" do
   Setting.create(key: 'map_longitude', value: -3.7)
   Setting.create(key: 'map_zoom', value: 10)
   Setting.create(key: 'related_content_score_threshold', value: -0.3)
+
+  Setting['feature.homepage.widgets.feeds.proposals'] = true
+  Setting['feature.homepage.widgets.feeds.debates'] = true
+  Setting['feature.homepage.widgets.feeds.processes'] = true
 end

db/migrate/20180519132610_create_widget_feeds.rb

@@ -0,0 +1,6 @@
+class CreateWidgetFeeds < ActiveRecord::Migration
+  def change
+    create_table :widget_feeds do |t|
+    end
+  end
+end

db/migrate/20180519132715_create_feeds.rb

@@ -0,0 +1,6 @@
+class CreateFeeds < ActiveRecord::Migration
+  def change
+    create_table :feeds do |t|
+    end
+  end
+end

db/schema.rb

@@ -378,6 +378,9 @@ ActiveRecord::Schema.define(version: 20180519132715) do
 
   add_index "failed_census_calls", ["user_id"], name: "index_failed_census_calls_on_user_id", using: :btree
 
+  create_table "feeds", force: :cascade do |t|
+  end
+
   create_table "flags", force: :cascade do |t|
     t.integer  "user_id"
     t.string   "flaggable_type"
@@ -1236,6 +1239,9 @@ ActiveRecord::Schema.define(version: 20180519132715) do
     t.datetime "updated_at",                  null: false
   end
 
+  create_table "widget_feeds", force: :cascade do |t|
+  end
+
   add_foreign_key "administrators", "users"
   add_foreign_key "annotations", "legacy_legislations"
   add_foreign_key "annotations", "users"

db/seeds.rb

@@ -125,3 +125,8 @@ Setting['map_zoom'] = 10
 Setting['related_content_score_threshold'] = -0.3
 
 Setting["feature.user.skip_verification"] = 'true'
+
+Setting['feature.homepage.widgets.feeds.proposals'] = true
+Setting['feature.homepage.widgets.feeds.debates'] = true
+Setting['feature.homepage.widgets.feeds.processes'] = true
+