fixed turnOff
turned clients SynchQueue to static
added skeleton for handler
added semaphore
added isValidCommand
added isValidCommand
implemented run
added main to test
added handler main for debugging
added client class
changed PORT to be public
wrote confirmation message on success
implemented run
added main testing code
added debug statements
added test class
added debug statement
finished main
added independent executors
reverted to 1 executor