Module structure and new features

[evilham]

I'm working on a project as a participant in the Cloud Accelerator in Barcelona and think this could be useful for you and people looking forward to playing around with AutocadIO :).

Since I'll be needing some other features, I'll gradually implement them in my fork and make a new pull request when I'm done; this is mostly so that you know someone is working on this repo and you make any general comments / recommendations you may have.