Added append_rr method to IteratorResultContainer - added response to container. Swapped processName and levelname in recovery logs. Added filename to iterator. Optimized get_local_ranges_by_address(). Fixed dc2 for multi-range single-result-file iteration.
Added recovered_bytes to dc2 statistics. Added wait at the end of recovering.
Merge pull request #120 from shaitan/master

Fixed and optimized dc2 for new iterator.