Working on a prefix-table to manage user commands.
Created prefix-tables general data sctructure. For the telnet chat
server, this will primarily be used for commands
Changed t_user and t_userlist to just user and userlist.

I found I wasn't doing that with new stuff, so to stay consistant I
changed it.
Created a globals header for stuff that needs to be global, such as a
userlist
Creating a parser for user data, that way I can see if a user is using a
command and go from there.

I don't want to clutter up chat.c with unrelated stuff
Merge branch 'dev' of bitbucket.org:marsol0x/chatserver into dev