Log HTTP Server Info On Startup

[armaniferrante]

When starting oasis-chain we receive the following logs

2019-09-18 13:08:24,171 INFO  [oasis_chain] Starting Oasis local chain
2019-09-18 13:08:24,200 INFO  [ws] Listening for new connections on 127.0.0.1:8546.
2019-09-18 13:08:24,202 INFO  [oasis_chain] Oasis local chain is running

This gives WebSocket information but nothing about the HTTP server. We should also log the HTTP information to make developing for the first time a little easier/more clear (otherwise one might not realize an HTTP server is up and running).