0.34.4

New Features

• #1151 Send is implemented for Iter
• #1167 added Tree::first and Tree::last functions
  to retrieve the first or last items in a Tree, unless
  the Tree is empty.

Bug Fixes

• #1159 dropping a Db instance will no-longer
  prematurely shut-down the background flusher
  thread.
• #1168 fixed an issue that was causing panics during
  recovery in 32-bit code.
• #1170 when encountering corrupted storage data,
  the recovery process will panic less often.