Estonian translation. Holiday_in_week change

New

Estonian translation. Thanks to @Repsionu

Fix

Change logic for holiday_in_week, so that it will (hopefully) correctly calculate collection at the collection day.
Related to tickets #199 and #198. This has been in beta for a long time, nobody confirmed if that fixes the issue.
Since there were no new issues either, I am making a release, so that more people use it and hopefully confirm it works now.