Home: type "suprises" -> "surprises".

Fix mix-it/linkit#291.
Layout members list on phone: make gravatar responsive, and reduced name font-size.

Fix mix-it/linkit#322
Merge pull request #323 from clacote/fix/322-members-list-responsive-on-phone

Layout members list on phone
Merge pull request #320 from clacote/fix/291-home-typo

Warning : this have not been tested ! :-)