This module provides functions for handling unicode byte order marks, which
are to be found at the beginning of some files and streams.

For details about what a byte order mark is, see the
http://www.unicode.org/unicode/faq/utf_bom.html#BOM manpage

The intention of File::BOM is for files with BOMs to be readable as
seamlessly as possible, regardless of the encoding used. To that end,
several different interfaces are available, as shown in the synopsis above.