improve receipt/details reports and implement number formatting

1) eager load reports for receipt/details
2) introduce number_format lookups to replace print_settings for number formatting
3) implement NumberFormattable concern, reference number_format lookups or print_settings if not exist, to get number format settings and number formatting
4) replace rails NumberHelper.number_with_precision with NumberFormattable.number_format hopefully to reduce overhead, formatting numbers for huge lists of data

app/helpers/application_helper.rb

@@ -1,4 +1,6 @@
 module ApplicationHelper
+	include NumberFormattable
+
 	def flash_class(level)
 		case level
 			when :notice then "alert alert-info fade-in"
@@ -6,5 +8,6 @@ module ApplicationHelper
 			when :error then "alert alert-error fade-in"
 			when :alert then "alert alert-error fade-in"
 		end
-	end	
+	end
+
 end