update sponsoring, add NL-IOI13 questions
some minor typo fixes in FR
NL prepare for 2014
fix of server error when clicking epreuve tab, both NL and FR
added a NL page on 1992, for the sake of history
fix links in nl2013archive page
Added an NL page about learning programming
Merge pull request #164 from jganseman/master

update NL and some FR fixes