Add BFC reading capabilities
This branch adds support for BFC files produced by LabSphere's BFC-450 spectrophotometer (#7 (closed)).
Having no official datasheet, this is based on retro engineering the file format from https://www.rit.edu/cos/colorscience/re_sgonzalez.php dataset.
EDIT: Now the link of the database is broken, not sure how you still can download the original files except from our private repository. Here is the archived webpage linked above: https://web.archive.org/web/20191018071813/https://www.rit.edu/cos/colorscience/re_sgonzalez.php
Edited by Alban Fichet