Remove implementation instructions for already implemented methods.
Shorter tab titles.
Fix visibility.
Consolidate error catching.
Add mapping of client IDs to server IDs.
Remove dummy method.
Remove old class.
Add todo.
Split out class for root folder.
Sanity check.
Fix undefined error.
Don't fall back to current time.

If we use the current time as the last-modification time, the ETag will never
match.
Split collection and object ID mappings.
Add task lists to CalDAV resources.
Fix calculating creation and modification times.