Work on Asciidoc files hosted on a Dropbox account

[jnorthr]

offer a feature so a community/team shared folder in a Dropbox user account can be used as both the source of .adoc files upon OPEN command and also as destination of .adoc files on SAVE. Since dropbox has an auto-sync feature, dropbox can manage file changes across devices.

But we may still have problems with colisions of my changes versus your changes, and V/V.