[jboss-as7-dev] Deployment Phase documentation

[Kabir Khan]

I made a very feeble start on documenting the deployment phases here: https://docs.jboss.org/author/display/AS7/Admin+Guide#AdminGuide-Deploymentphasesandattachments

If someone more familiar with the deployers has the cycles to improve on this I would really appreciate it. If not I will try again later this week once I've refamiliarized myself with the different parts.