Update deploy API to work with vert.x 2.0 API.
Update vertx.eventBus to conform to the vert.x 2.0 API
Improve eventBus tests to check 2.0 API fluency. Fix a couple of issues.
Adapt vertx.fileSystem to work with the 2.0 API.
Update http.js to work with vert.x 2.0 API
Update net.js to vert.x 2.0 api
Adjust route matcher and websocket APIs for vert.x 2.0