Redesigned to use put,get,remove and allDocs instead of
{save,load,remove}Document and getDocumentList.
These methods are similar to PouchDB methods.
Error objects are similar to jQuery and CouchDB.
Error status are unique.
Storage design difficulty decreased.

elrte new document is now empty.
We can now remember previous JSON login.

SlickGrid can now show documents that are in conflict or not,
and Basic Conflict Manager shows the last modify date of revisions.

It returns now an object containing the new revision instead of the new revision only

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.