Storage Manager: Backup Service support

[pchainho]

As specified here

[dvilchez]

Some doubts:

• Create syncher on StoageManager. To create a syncher I need the domain, the hypertyURL, the target hypertyURL, the bus and the configuration. Could you state what are the right values for these params.

• Add a DataItem.

extend storageManager.set(..) with "backupAuthorised : userURL[]"

I guess each value could have its own backupAuthorised configuration. Where in the Databackup object can I set up this param?

• Resume the Dataobject sync. The url you link is broken.

/cc @pchainho

[pchainho]

A short term solution is to use dexie sync server