The Shreveport Times: february 2006: Already-skinny arts groups go on a dietFebruary 14, 2006By Jennifer Flowersjenniferflowers@gannett.comMost nonprofits say survival is a matter of staying lean and mean.And it looks like depleted funds are giving arts groups no choice but to trim their fat.Despite healthy box office numbers, most of Shreveport's biggest arts organizations that scraped by last y