Made every collection synchronized

Need to synchronize the loops correctly.
Added Synchronized loops to the cashier, cook, and marketAgents.

It should work good, but I'll run the program just to be sure
Added Synchronized loops to the customer agent
Synchronized loops added for the HostAgent
Added synchronized blocks onto the waiter.  Now it is just a matter of testing to make sure that everything works...
Made it so that the customers start with more money