Add support for reading exif tags from IO objects #53
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- Updated `README.md` to include instructions for reading metadata from IO objects. - Modified `lib/exiftool.rb` to handle IO objects as input, allowing ExifTool to infer file type from content. - Utilized `Open3.popen3` for executing shell commands, ensuring proper process management and error handling. - Added a test case in `test/exiftool_test.rb`.
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README.mdto include instructions for reading metadata from IO objects.lib/exiftool.rbto handle IO objects as input, allowing ExifTool to infer file type from content.Open3.popen3for executing shell commands, ensuring proper process management and error handling.test/exiftool_test.rb.Fixes #52