Update u2json program with full spooling support and Suricata like output.
Regenerate apidoc.
Remove u2tail (u2fast and u2json cover it).
Flesh out u2tail.
Move bookmaring into SpoolEventReader, it runs at too high level of abstraction for the user to do it.
Make u2fast like u2json (this should become one program with a selectable output mode).
Document u2json.