Add .dropboxignore directory to exclude folders without using selective sync

Agreed pawelt, we have at least 4x threads just like this, that has been open for years, most advocating for a .dropboxignore option.

Since from a developer point of view this would be relatively easy, and hence the outcry at Emma sighting the ephemeral command line option of ignoring files are the way to go, and the solution to all our problems. Which it is not.

Currently it makes Dropbox useless for most any developer, and many have resorted to other options. Some of us have given up hope, but are still stalking in the hope of someone from Dropbox championing our cause.