added user model

front-api/db/migrate/20150218053655_create_users.rb

@@ -0,0 +1,10 @@
+class CreateUsers < ActiveRecord::Migration
+  def change
+    create_table :users do |t|
+      t.string :first_name
+      t.string :last_name
+      t.string :email
+      t.string :password_digest
+    end
+  end
+end