TTL on harvester inserts added.
Also moved the TTL to  DBScrypts.java
#newsmute-60 In Progress
Got rid of YawnFeedItem. It's existence was itself confusing when moving data as a specific model. Now the source is on the YawnItem class. We could make the source of screams to be the shared user hash, so that it can be used for blocking spam? ;-)
#newsmute-60 In Progress