We should provide RESTful APIs to access various job states and metric (ex. execution times) for NEMO users.
The description of APIs can be found at https://goo.gl/4ngKBb; currently job-state and executors are implemented.
You can test the feature by simply running an example and by sending HTTP requests as follows:
NOTE: For now, you need to find the HTTP server's port number from the `driver.stderr` log, but we can set `TcpPortRangeBegin` with which Driver starts scanning available ports.