Adds support to SSL on Wildfly

To try this image follow the build instructions or just run:

`docker run -it -p 8080:8080 -p 8443:8443 abstractj/wildfly:jboss`

Or just run:

`docker build -t jboss/wildfly .`

The readme instructions were updated, also.
Please note that this file needs to be kept up to date with the WildFly release and every time we upgrade WF it needs to be recreated. Maybe there is another way of creating this file on the fly? Maybe using one of the [techniques mentioned in my blog post](https://goldmann.pl/blog/2014/07/23/customizing-the-configuration-of-the-wildfly-docker-image/)?