check disk space before upload a file
improve disk usage recovery
merge conflict
Convert email attachements to buffers
Merge pull request #98 from frankrousseau/master

better error management on device creation
Merge remote-tracking branch 'upstream/master'
use noreply@... instead of user email
doesn't recover user in sendFromUser function
Merge pull request #97 from clochix/master

Convert email attachements to buffers
Merge pull request #99 from poupotte/master

Fix issue #84
build
(fix #100 and #86) Properly manage bulk deletion based on a request.

* delete docs by batch of 100
* use bulk_docs route of couchdb db to perform deletion
* waith 0.5s before running a new deletion batch