Upgraded to vert.x 1.3.0.final

Hello Thorsten,

Thanks for your redis busmod. I am currently working on a busmod implementing a scalable queue server with redis persistence (https://github.com/lbovet/vertx-redisques). I hope it will soon become a true module.

I just adapted vert.x-busmod-redis to build with vert.x 1.3.0, hence the pull request.

Cheers,

Laurent