[NTG-context] Modern CV like cover letter example

Hello everyone, As suggested by Wolfgang Schuster here : https://mailman.ntg.nl/pipermail/ntg-context/2016/087113.html , I have added on the wiki an example of a cover letter that has a similar style to Modern CV. You will find it here : http://wiki.contextgarden.net/Letter_style#Modern_CV_like_cover_letter . I hope it can help. Cheers, Jonas Baggett