CONTRIBUTORS: add Martijn Dekker (ksh93)

cde/CONTRIBUTORS

@@ -37,6 +37,7 @@ Lev Kujawski <int21h at mailbox.org>
 Liang Chang <l-chang at users.sourceforge.net>
 Marc Balmer <marc at msys.ch>
 Marcin Cieślak <saper at saper.info>
+Martijn Dekker <martijn at inlv.org>
 Matthew Howkins <mhowkins at users.sourceforge.net>
 Matthew R. Trower <dev at blackshard.net>
 Michael McConville <mmcco at mykolab.com>