Fix Twitter bug

Success were no longer post on Twitter
(https://dev.twitter.com/discussions/25174)
Merge pull request #124 from Cedric-Huguenin/patch-1

Fix Twitter bug
add a few ideas, and convert to unix line terminaisons
fix some french typo in the engine
fix a typo in english
add a pointer to howto translate in each and every html files
Engine is now translated to italian
fix the pseudo of the italian translator
Fix the html structure of these files
fix another html file's structure
fix some typos in english
fix a bunch of french typos