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.
@goldmann I'm cool with that, but what's your suggestion of making it optional? Just add it to the image and let people specify with --entrypoint=/opt/wildfly/bin/launch.sh for example?