By Richard Mize Real Estate Editor rmize@oklahoman.comOne rising tribe can't lift all, but the Chickasaw Nation can elevate some, and Golden Mesa Casino's groundbreaking last week in Guymon is a good example of American Indian tribes working together. Dan Boren, president of corporate development for the Chickasaw Nation, said the $25 million project, developed by the Shawnee Tribe in cooperation with the Chickasaws, exemplifies the kind of economic diversity that leads to social equity in Indian Country. Boren, the former U.S.