RFC: Refactor of Nebula-Node

[wey-gu]

@huaxiabuluo is working on a refactor of this project.

• remove 3pp package from the repo(leave them in package*.json only)
• introduce package-lock.json
• jest for test
• removed the thrift-gen code
• more(@huaxiabuluo to add more)

master...huaxiabuluo:nebula-node:master
PR: #27

@wujjpp what do you think? He assumed no modification of dep packages and thrift-gen code was not modified manually, for now the test cases passed but not sure if it could work in production, could you help advise on this proposal?

Thanks!