SnapRAID v9.1

• Fixes a bug when reading a content file with a deleted entry bigger
  than 4 GB. This was a regression introduced in version 9.0 that
  could result in the impossibility to read a valid content file,
  after a deletion of a file bigger than 4 GB in the array.
  If this happened to you, just upgrading to 9.1 fixes the issue, and
  it allows you to continue to work.
  Note that this bug only prevented to run 9.0, but your data was still
  protected and could have been recovered using the versions 8.1 or 9.1.
• In Windows disables the file zero check requiring the --force-zero
  option. This check is intended for possible case using ext3/4 in Linux,
  and there is no evidence that in Windows it's possible at all.
• Windows binaries built with gcc 4.9.3 using the MXE cross compiler at
  commit 62bcdbee56e87c81f1faa105b8777a5879d4e2e with targets
  i686-w64-mingw32 and x86_64-w64-mingw32 and optimization -O2.