In the past two quarters, funds increased their stakes in coffee, doughnuts and ice cream play Dunkin' Brands Group (DNKN). As of December, 284 funds held shares vs. 258 in June. The stake at year-end was 75.9 million shares vs. June's 59.2 million. Dunkin' is a July 2011 initial public offering. Income is derived from five sources: royalty income and franchise fees; rental income from properties leased to franchisees; ice cream sales to