lk | removes unused client tables and makes date sold a datetime to be consistent

db/migrate/20160731020409_remove_unused_columns_from_clients.rb

@@ -0,0 +1,7 @@
+class RemoveUnusedColumnsFromClients < ActiveRecord::Migration
+  def change
+    remove_column :clients, :number_of_calls
+    remove_column :clients, :application_date_bkp
+    remove_column :clients, :pickup_date_bkp
+  end
+end

db/migrate/20160731020658_change_bike_date_sold_column_to_date_time.rb

@@ -0,0 +1,9 @@
+class ChangeBikeDateSoldColumnToDateTime < ActiveRecord::Migration
+  def up
+    change_column :bikes, :date_sold, :datetime
+  end
+
+  def down
+    change_column :bikes, :date_sold, :date
+  end
+end