Adding POST /api/v1/reports API, and a UI for submitting reports

db/migrate/20170214110202_create_reports.rb

@@ -0,0 +1,13 @@
+class CreateReports < ActiveRecord::Migration[5.0]
+  def change
+    create_table :reports do |t|
+      t.integer :account_id, null: false
+      t.integer :target_account_id, null: false
+      t.integer :status_ids, array: true, null: false, default: []
+      t.text :comment, null: false, default: ''
+      t.boolean :action_taken, null: false, default: false
+
+      t.timestamps
+    end
+  end
+end