Added support to bind to localhost address
coordinator.conf:
-added option 'server_bind_local' to indicate whether the web server should also bind to the localhost address, default option is to only bind to the loopback interface

Coordinator.java:
-added support for reading this option

SimpleHttpServer.java:
-added additional constructor for chaining
-changed logging for all the handle() methods to print origin address, request type, and request URI