Adds the ability to configure the IP address on which simple-brepl binds.

Previously, the configuration was solely the port, optionally overridden via :brepl-port
key within project.clj. Now, the configuration is an optional :brepl key with a map
value that looks like {:ip "127.0.0.1" :port 3080}.
Defaulting to listening on localhost
Turns out it was easy enough to maintain backward capability
Updating the sample project to demonstrate new config
Merge branch 'customise-ip' into 0.1.1-release
Updating to 0.1.1, updating README and CHANGES
Merge branch '0.1.1-release'