added price per unit to item details page

front-api/db/migrate/20150130040553_add_description_suffix_to_unit.rb

@@ -0,0 +1,5 @@
+class AddDescriptionSuffixToUnit < ActiveRecord::Migration
+  def change
+    add_column :units, :description_suffix, :string
+  end
+end

front-api/db/migrate/20150130041842_add_number_of_pieces_suffix_to_unit.rb

@@ -0,0 +1,5 @@
+class AddNumberOfPiecesSuffixToUnit < ActiveRecord::Migration
+  def change
+    add_column :units, :number_of_pieces_suffix, :string
+  end
+end