Home Assistant Token Update

[arirobinson]

I find it simpler to define the home assistant access token in the module config file.

This updates the node_helper.js code to get the token from the config file and updates the readme.md to show the token in the config.js

[aserramonner]

Thanks a lot for the contribution !

I would not like to break current users of the environment var approach. Any idea about how to combine both approaches ?

[iorifly]

need help. I made all the changes and still have an error.