Add Vert.x 2.0.0

Adding the newest version of the Vert.x client library (2.0.0). Both original and minified versions.

Both original and minified files are found in the `client` directory of the Vert.x 2.0.0 final distribution package from http://vertx.io/downloads.html

The corresponding Vert.x release is tagged at https://github.com/vert-x/vert.x/tree/v2.0.0-final. However, the minified version is produced at build time and is not stored in the Git repository.