• Added "-o direct_io" option.
  This option disables the use of page cache in kernel.
  This is useful for example if the file size is not known before reading it.
  For example if you mount /proc dir from a remote host without the direct_io
  option, the read always will return zero bytes instead of actual data.
• Added --verbose option.
• Fixed a number of compiler warnings.
• Improved performance under OS X.