cmex10.ttf, msam10.ttf, cmr10.ttf, cmmi10.ttf : Copyright (C) 1997 American Mathematical Society
FreeSerif.ttf : Copyleft 2002, 2003 Free Software Foundation.
lmroman10-regular.ttf : Latin Modern Roman 10 Regular, Copyright 2003-2009
    by B. Jackowski and J.M. Nowacki (GUST e-foundry, http://www.gust.org.pl/),
    distributed under the GUST Font License (LPPL-equivalent, redistribution permitted).
    Source: lmroman10-regular.otf from fonts-lmodern (Ubuntu) / GUST e-foundry.
    File renamed to .ttf so it slots into the existing $fontesmath lookup pattern in
    mathpublisher.php (which hardcodes a .ttf extension); GD reads the OTF data fine.
