Merge pull request #7 from adurieux/master

feature(css) : improved design.
Merge pull request #8 from adurieux/master

fix(html) : change colors.
Merge pull request #9 from adurieux/master

fix(colors) : fix css.
feat(mailinglist): add mailing list registration
Merge pull request #10 from perrinood/feat-mailinglist-registration

feat(mailinglist): add mailing list registration