Chip Wilson — founder, largest shareholder and chief agitator for change at Lululemon Athletica Inc. — continues to be unswayed by the company’s efforts to reset management and turn operations around.  Wilson, who’s trying to appoint a slate of three independent directors to the company’s board, made his case again in a letter to shareholders on Wednesday.  “Your investment in Lululemon Athletica Inc. is in trouble,” he said. “The current board of directors of Lululemon simply does not understand this business and, as a result, shareholders have suffered.” Investors have certainly been feeling the pain, with Lululemon’s market capitalization down to $16 billion from over $60 billion just over two years ago.…