Feature request: two-way sync

[LeonardoGentile]

Hello and thanks for your work, much appreciated!

Since owncloud is not able to provide this features (owncloud/android#3) I was wondering if you could help us out.
The main use-case would be to sync the entire Camera folder and inner folder structure. As a workaround one could consider using FolderSync app together with owncloud but unfortunately this and similar apps (Synchronize Ultimate for example) change the Created/Modified timestamp of the synced files to upload time (not the best solution).

Considering that a continuos watch on certain folders might not be optimal or just power consuming I was thinking about a sync button specifically to check the two-way syncing pre-configured folders or a settings to check the files every X time.

Thanks