remove unnecessary import in Persistent.java darcs-hash:20081109032421-5007d-2a8958e91bae8d4e8993738f16fb047bbf46b69e.gz
disable everything that requires extraneous third-party jarfiles darcs-hash:20060710003203-5007d-613822c219283064f30aeb9c941b5bdf62e58332.gz
added Persistent darcs-hash:20050325062957-5007d-099427c0dfd5bfe36fd39be02ccceeea2c840b62.gz