* y/restore: (56 commits)
  zodbrestore - Tool to restore content of a ZODB database from zodbdump output
  zodbcommit: Prepare to compute current serial of an oid lazily
  zodbcommit: Don't forget to call tpc_abort on an error
  Drop support for ZODB3
  tox: Don't run tests agains ZODB+PR183 anymore
  Add way to run tests via nxdtest
  tidrange: test: Fix for py3
  *: dict.keys() returns sequence, not [] on py3
  *: Pass bytes literal into BytesIO
  zodbdump: Use bytes to emit its output
  *: Zodbdump format is semi text-binary: Mark it as such + handle zdump output as binary
  *: Don't use %r to print/report lines/bytes to outside
  zodbinfo: Provide "head" as command to query DB head; Turn "last_tid" into deprecated alias for head
  test/gen_testdata: Fix for ZODB5 > 5.5.1 + preserve database compatibility with ZODB3/py2
  tox: Don't duplicate setup.py on which for-tests dependencies we need
  zodbdump: Default out to stdout in binary mode
  *: s.decode('hex') -> fromhex(s)
  utils: Initialize hashers with bytes
  *: Pass bytes - not unicode - literals to sha1()
  util: Fix ashex for Python3
  ...