- Add switch for compression of image at end.
- Allow user to edit portsnap.conf
- Add interactive flow.
- Look up svn revision before pre-flight so it doesnt have to be set twice.
- Add sanity checks: ** Check sizes, e.g. Can't add ports to a 1 GB image with a 512MB swap, and the like. ** No point in updating svn if no build and vice versa.