Tracked down common used i18n tags and applied it already on the nl.coffee file
Found more duplicate i18n tags and applied it both to the ar.coffee and nl.coffee file
fix i18n tag in editor and setting template
french grammar and orthograph fix.
Found more tags. ar, bg and nl should have now the correct versions with the (re)moved i18n tags.
Merge branch 'translation_fr2' of https://github.com/MartinDelille/codecombat
Applied big i18n tag update to ar, bg, cs, da, de, en, nl.