-deleting and generating keys are now transactions
-adding uids is now handled by a transaction
-a transaction may fail in preStart()
-bad passwords are handled directly by KGpgTransaction instead of the subclasses
-set successful status in KGpgAddPhoto
-use "new password" mode in KGpgChangePass

svn path=/trunk/KDE/kdeutils/kgpg/; revision=861302