move TimestampedNotificationData to sipsimple.util

darcs-hash:20090421051012-b2873-4752ff629d6e1bd6995daef7eca27b1757449298
remove some dead code from the scripts

darcs-hash:20090421051222-b2873-cf25be497b601c97f325a56e8869665d4d182f5a