Sync tasks via CalDAV vTODO

[spoorun]

The module should enable syncing so that Users can sync with other apps, for example their smartphone or laptop Task apps. This would enable far more effective productivity as most users manage tasks from Smartphones, tablets and other devices, and syncing would ensure task management was embedded in their ecosystems. There are CalDAV sync apps for all common devices and operating systems.

[Nos-]

Humhub looks nice but with CalDav included it could be an useful tool.

[spoorun]

We are prepared to pay a €100 bounty for this issue if developed to a usable level and posted to market.