initialize invites

Invites model,controller and views are initialized.

add datepicker and selectize in invites#new

calender is added for end date field and selectize is added for emails field to allow multiple emails in field

db/migrate/20190810082925_create_invites.rb

@@ -0,0 +1,12 @@
+class CreateInvites < ActiveRecord::Migration[5.2]
+  def change
+    create_table :invites do |t|
+      t.integer :conference_id
+      t.integer :user_id
+      t.date :end_date
+      t.text :invite_for
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2019_06_12_161235) do
+ActiveRecord::Schema.define(version: 2019_08_10_082925) do
 
   create_table "answers", force: :cascade do |t|
     t.string "title"
@@ -264,6 +264,15 @@ ActiveRecord::Schema.define(version: 2019_06_12_161235) do
     t.datetime "created_at"
   end
 
+  create_table "invites", force: :cascade do |t|
+    t.integer "conference_id"
+    t.integer "user_id"
+    t.date "end_date"
+    t.text "invite_for"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
   create_table "lodgings", force: :cascade do |t|
     t.string "name"
     t.text "description"