Madonna&rsquo;s high-profile charity in Malawi has collapsed, amid allegations of lavish spending on cars, salaries and a golf course membership, and $3.8 million spent on a girls&rsquo; school that won&rsquo;t be built, The New York Times reported. Signs of upheaval had marred the charity, Raising Malawi, for months. The newspaper reported that the foundation&rsquo;s board [...]