New features

screen-shot-2016-12-14-at-14-26-33
 screen-shot-2016-12-14-at-14-28-33
    Suggested setup (a 12% tax rate with two components): screen-shot-2016-12-14-at-14-24-40
 Receipt printout: screen-shot-2016-12-14-at-14-25-41


Improvements


Fixes