DBus Plugin Integration

By DOSprompt 2.0 final (hopefully) we plan to have a powerful plugin API using DBus. This should include an easy way to gather information such as the exit code of the last command. It should also include an interface for other applications to listen for and act on certain commands, and to virtually type and run a command. This DBus API would make it much easier for plugins to do amazing things like giving short, interactive tutorials, or helping you out as you type.