Set token in request for access from handler

[mcortesi]

We set the jwt token on successful authentication in the request object.
It is stored in request.auth.token.

This allows access to the token from handler. It can be used, for
example to proxy request to another server using the user's token,
without needing to issue a new one.

[mcortesi]

Check #123 for the discussion.

@nelsonic this implements exposing the token in request.auth.token and in request.auth.artifacts. If you want it any other way, let me know.

[nelsonic]

@mcortesi looks good.
we will need to add a small section of documentation to the Readme to inform new people that the token is now available throughout the request lifecycle if people need it. similar to: https://github.com/dwyl/hapi-auth-jwt2#want-to-sendstore-your-jwt-in-a-cookie

[mcortesi]

@nelsonic done!

I updated the package version following you instructions, but i saw that you edited the comment, so I put them in another commit just in case.

The README is now part of the initial commit.

[nelsonic]

Sweet. looks good. 👍

[nelsonic]

@mcortesi latest version is on NPM: 5.2.1 thanks again for using the Plugin.
please ⭐ the repo.