(dairy sold agricultural preservation easement to state conservation agency; ten years later dairy sought permit to build creamery; agency granted permit; local group opposed permit arguing they had standing as third-party beneficiaries to easement, as "aggrieved" parties under state trust code because the easement constituted a charitable trust; court determined easement was not charitable trust because language in document and in statutory scheme indicated trust meant to benefit dairy and agency only and not public; because no charitable trust, group lacked standing to challenge permit; dismissal affirmed).