Update NL preparation parts (C++ and Java instead of Python)
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