* Add a function to percent encode username
* Add parameter 'queuename' to add_user function.
* Add parameter 'queuename' to consume function.

It acted like task manager when first design it.
Now we have proper task manager, update it.
The default behavior will be a caller waiting to complete msg

Now consume can take routing key as argument

user should explicitly call disconnect
Modify README regarding explicity disconnect call

Change to only one exchange, so there's only one instance, rc_rmq

Remove trailing whitespace
Add space between '+'

After standup meeting, change the exchange name to Register

including add_account and consume function