Merge pull request #179 from FKint/master

Update NL preparation parts (C++ and Java instead of Python)
2014 in archives (fr)
update 2014 archive
update contest page for 2015 (fr)
update images for contest page
apply Floris changes to French
rules for 2014, in French
add bonus per year rule
translated rules and 2014 archive
Merge pull request #180 from jganseman/master

translated rules and 2014 archive
prepare registrations fr
update NL registrations. also fixed date in fr: 19 nov
Merge pull request #181 from jganseman/master

update NL registrations. also fixed date in fr: 19 nov
fix error page which were causing errors
fix error page which were causing errors (2)
fix error page which were causing errors (3)
fix error page which were causing errors (4)
update the ioi dates (which has changed again)
update contest.html nl
typo fixes NL