Client now sends a nick and server has a clients list.
Messages are kind of classified.

Whether is't a JOIN message, regular one, or anything.
Write the dispatch (and out) functions.
Add the dead processes reaping.
Merge branch 'master' of https://github.com/TomiCode/chatty into Tomi
Use the threads on the server.
Server handles the SIGINT, and the client send the JOIN message.
Write the function get_nick_by_fd().
Write the send_to_fd() function.
Change the way special messages are handled.

There is no special character, it's just a plain messages, but when it starts
with '/' then it's a command.