woop/rpc

Files that are mainly ported over from go-ethereum (might include tslint fix):

• rpc/client.go: the rpc client.
• rpc/endpoints.go: starting HTTP/WS/IPC endpoints.
• rpc/errors.go: error code handling.
• rpc/handler.go: handling requests, running methods.
• rpc/http.go: starting HTTP service.
• rpc/ipc_unix.go: util for ipc unix
• rpc/ipc.go: util for general ipc
• rpc/json.go: json de-/serialization
• rpc/server.go: the rpc server
• rpc/stdio.go: stdio for ipc.
• rpc/subscription.go: ws subscriptions.
• rpc/types.go: type declarations
• rpc/websocket.go: ws connection.
• rpc/hmyapi/addrlock.go

Richard's changes:

• rpc/service.go: our service (http/ws/ipc) starter/stoper
• other files under rpc/hmyapi/.
• other files that are not in rpc folder. Added some util functions.