Tesla's Musk tells disgruntled shareholders: Buy Ford

By Alexandria Sage and Nick CareySAN FRANCISCO/DETROIT (Reuters) - A group of Tesla Incinvestors has urged the luxury electric car maker to add two new independent directors to its board, without ties to Chief Executive Elon Musk, to "provide a critical check on possible dysfunctional group dynamics."A defiant Musk took to Twitter on Wednesday afternoon to suggest the investors buy stock in Ford Motor Coinstead.The Ford family controls the Detroit automaker through two classes of stock.In a lett