As a boy in the 1980s, Mark Magee remembers trying to cross Mersey Street in East Belfast on his way to school through the rush of traffic bringing men – packed four to a car – to work in the Harland & Wolff.  But as of this week, the city’s historic shipyard company is warning investors that it cannot report financial information to them as a going concern and three directors resigned from its board on Tuesday evening. The company “had a terrific workforce,” said Magee, now 56 years old. “The whole skyline was full of cranes” but then “it seemed…