Minor fixes and typos
Translate activiy 16 in French
Merge branch 'content-translation-fr' of https://github.com/DirtyF/Retromat into content-translation-fr

* 'content-translation-fr' of https://github.com/DirtyF/Retromat:
  Minor fixes and typos
Translate activity 17
Reindent JS
Translate activity 18 in French
Translate activity 19 in French
Translate activity 20 in French
Merge branch 'master' into content-translation-fr
Translated activity 22 in French
Translated activity 23 to French
Translated activity 24 to French
Translated activity 25 to French
Translated activity 26 to French
Translated activity 27 to French
Merge pull request #9 from real34/content-translation-fr

Further French translations (17 -> 27)