V1 -- Remove --open call on npm start

[sthzg]

As brought up in generator-react-webpack #266

V1

• remove open() method in server.js
• log dev server address to console after the inital webpack build is ready

[sthzg]

@weblogixx it will now print the following info to the shell after the initial build (on V1 of the template).

[weblogixx]

Seems like a nice addition. Do you think we should wait a bit until more 1.x features are there or do you want to push it directly? I do not think that we will have any more advanced features for the current stable, so pushing would ok.

[sthzg]

I think waiting is absolutely okay. I just want to merge it so that I can delete the feature branch. Besides being a topic in the browser sync issue it's not such an important change, after all.