Added 3 more tables to store id's of forums, topics, and threads.
I also renamed existing tables to better describe their job.
the following tables are now used:
forums stores ids of forums
topics stores ids of topics, and parent forums
threads stores ids of threads, and parent topics & forums
forum_info stores key value pairs
topic_info stores key value pairs
thread_info stores key value pairs
Signed-off-by: Ricky Barrette <rickbarrette@gmail.com>