Add support for JSON Web Token

[mcicolella]

In order to create a web client based on Vue.js we need to enable JWT (see freedomotic/fd-vue-webapp#7).
Freedomotic's APIs are served by RestAPIv3 plugin and the authentication is based on Apache Shiro.
As reported here we could use jjwt library.

[ayushkalani]

I'm interested to do this.

[ayushkalani]

I have used jjwt library for generating and validating jwt tokens please inform which file and where to make those changes, we can write a new jwt service.

[bestmazzo]

@ayushkalani Thank you for your support!
Changes will surely involve RestAPI3 plugin (which relies on Apache Jersey and Atmosphere frameworks)

[mcicolella]

@p3trur0 @abollaert @bezmax @jasper-vandemalle what about?

[ayushkalani]

Should I start working on it ?

[mcicolella]

I think so.

[mcicolella]

@ayushkalani are you working on this?

[ayushkalani]

Weekend is here, I'll complete it this weekend.

[mcicolella]

@ayushkalani any news?

[mcicolella]

@ayushkalani are you still on this?