#24, #5
fix error: getPerm() not found.
fix error -301 by listWaves
check login state in listWaves()
return ERR_ALREADYEXISTS in dat('new') if attr already exists.
#13 : update __contruct(), init(), setValue(), listAllAttr()
#13: update putdata, #5: insert addUser, rmUser, listUsers
#5: update init, add, remove, refresh