Adds timezone to Entsoe prices

db/migrate/003_creates_prices.rb

@@ -0,0 +1,10 @@
+class CreatesPrices << ActiveRecord::Migration[4.2]
+  def change
+    create_table :prices do |t|
+      t.datetime :hour
+      t.float :usage_kwh
+      t.timestamps
+    end  
+    
+    add_index :prices, :hour 
+end