recovery: initial commit
recovery: more robust append to container
recovery: simplified dnet_iterator_response_container_sort()
recovery: added dnet_iterator_response_container_diff() stub
recovery: added basic stats
recovery: reworked iteration

Also added TODOs and code stubs for sort, diff and recovery.
recovery: improve error reporting
recovery: renamed routes to route for consistency
recovery: format stats output
recovery: diff stub, cleanups and logging
recovery: simplified stats reporting
recovery: added notes about iterator throttling
recovery: measure recovery duration
recovery: it: use new API
recovery: sort stats by name
recovery: simplified diff
recovery: fixed iterator's append
recovery: marked critical flaws with XXX
recovery: removed unused import
recovery: only non-data iterator can be used right now recovery/recover/iterator.py