Merge recovery: changed statistics name to clearly separate remote and local request counters. Added timestamps for end of group and main blocks.
Python: Updated docstrings for binding. Cleaned up binding's exports. Added IoAttr to ReadResultEntry. Added get_addresses_with_id and filter_by_group_ids to RouteList. Extended set_indexes, update_indexes to accept dict as {'index':'data'}.
Python: Provided Error, NotFoundError and TimeoutError directly from elliptics module. Removed hiding elliptics.core module.