Add object feature tns_name

[RoyWilliams]

(1) We want to have a new feature called tns_name. Features are built from a batch here. Note that the tns_name feature is NOT added at this time, just put in a NULL

(2) Then the watchlists are run here. The function insert_watchlist_hits here would get copied and rebuilt as a new function `insert_tns_hits_in objects to be called immediately after, with a query that looks like

    REPLACE into objects (diaObjectId, tns_name) VALUES (...)

(3) User filters are run after this

[RoyWilliams]

Possible enhancement: Matt Nichol says he wants the TNS classification as another feature. But now theres an extra database SELECT in addition to the extra database REPLACE!