Prevented that an "undefined" usertoken can be used for authentication

simpledb_w_memcached modified in order to save in parallel both on memcached and simpledb (usually gets the reply from memcached)
Corrected the getTokenData, for only allowing to read data written by the same token
Corrected the setTokenData, for saving the token inside the saved object
Reparsing the object passed to removeBlacklistedAttributes because for some reason, if we change what storage.xxx passes us as a result, it appears that the *changed* object is saved (so the ok is arriving BEFORE it is really saved?!?!?)