Ensure file is not written by other process before uploading it

[pixtron]

Description

Is:
It might occur that a process is still writing to a file, while it is being uploaded.

Should:
Get size or hash of file before upload starts, timeout, compare hash or size to current: if equal start upload, else timeout. If not equal set new timeout.

balloon desktop version

0.2.3

Your client operating system

N/A

Filesystem (If known)

N/A

balloon server version (If known)

N/A

[pixtron]

Will be fixed with update to balloon-node-sync >= v0.6.4