Fixes mix-it/linkit#57 : "500 people each day" -> "500 people".
Fixes mix-it/linkit#73 : Edit session page ported to Bootstrap3.
Login buttons now take whole div width : better looking!
Merge pull request #80 from clacote/fix/login-btn

Login buttons now take whole div width : better looking!
Merge pull request #79 from clacote/73-create-session

Fixes mix-it/linkit#73 : Edit session page ported to Bootstrap3.
Merge pull request #78 from clacote/fix/57-500-people

Fixes mix-it/linkit#57 : "500 people each day" -> "500 people".