wat?
Updated to be in compliance with updated Sender class.

"A sender object may now be used to write messages to more than just one
output stream. This means that the send() method now requires a
PrintStream."
Moved Sender creation out of constructor and into open()
Testing in main method.
Implemented constructr, start(), stop(), and main method
Made ClientWorker a subclass of Client.
Made ClientWorker a subclass of Client
FUCK YOU, GIT!