ES1-2016-METIA1-32 Files

Changelog
Server:
 - Major revamp of all the code to accommodate the other parts;
 - Code is much cleaner now and readable.

Communications:
 -Added new method to send messages to all of the clients online;
 -Added new method to send errors to all;
 -Added new method to parse the nickname and see if is not already taken.

Client:
 -Added new code to deal with a name already taken;
 -Added new code to clean all the orders if that client is disconnected; 
 -Minor stuff changed (e.g. String names).

Use case demostration url: https://youtu.be/cF_DXtSDi4c