* Manchester City slump to 1-0 defeat at Dortmund * Reserve striker Schieber grabs second-half winner * City's points tally is lowest by an English team (Adds details) Dec 4 (Reuters) - Manchester City's European season ended in ignominy when they lost their final Champions League group match 1-0 to a below-strength Borussia Dortmund and a goal from reserve striker Julian Schieber on Tuesday. Schieber, starting only his second game for the club, slid home Jakub Blaszczykowski's cross as the English champions again looked out of their depth at European level. ... More...