Secure server with token based authentication

[psenthu]

The server should be secured with a token based authentication for pushing package updates. Also for clients to check for updated versions with an api-key key-secret based authorization to avoid attacks.

Todo:

1. User/System registration using existing authentication credentials.(Server should have default un & pw or Token)
2. All the API calls should be otherized with tokens before executing call endpoints.

Resources:
https://github.com/jaredhanson/passport
https://github.com/jaredhanson/passport-http-bearer
https://github.com/jaredhanson/oauth2orize