Implemented number of unique posters in a thread (based on IP)
Implemented number of unique posters in a thread (based on IP)

http://blog.4chan.org/post/102200648492/enhanced-thread-watcher-unique-posters-and-delayed
Closes #60

krynomore/4chan-x,loadletter/4chan-x,loadletter/4chan-x,krynomore/4chan-x,krynomore/4chan-x,loadletter/4chan-x