keep trailing '/' for the maintenence service url
Merge branch 'build' of https://github.com/mconstantin/nuxeo-drive into build
changed url trailing '/' to match maintenance and upgrade services
fix for #2665: ignore folders under root, other than My Docs and Other Docs
fix for #2639: remove setting the bind state for Other Docs when sending its status to the server
removed detection of changes in the sync folder dialog for now (wip)
fix for #2687: prompt user than the root folder is not empty, with a Yes/No question
temporary change for #2698: set default log level to DEBUG