GetDocumentList from conflict or dav with no document never calls fail or done

However, getDocumentList is not complete and do nothing for now.

Only Conflict Manager Storage tests have not been improved.

Fix getDocumentList setTimeout bug.

Redesigning JIO in order to use 'success' and 'error' callbacks instead of 'onResponse', 'onDone' or 'onFail'.

Dav can now get content with getDocumentList.
Conflict manager errors are managed better and more explicit.

The problem seams to not come from the crypt storage.

Tests works now on a virtual local storage

Only saveDocument is implemented yet, but it is not complete.