Add psql command for inserting non-exact movies and tv categories

[FunkeCoder23]

Closes# #80

[NebKi]

I would add something for the people that already imported the database and need to convert that. They can use the following SQL commands:

UPDATE ingested_torrents SET category='movies', processed='f' WHERE category LIKE 'movies_%';

UPDATE ingested_torrents SET category='tv', processed='f' WHERE category LIKE 'tv_%';