Assign classes to children

[kelonye]

E.g. make form element labels and inputs have an additional class of "span12" when the grid system is fluid. Or is their a workaround?

[bradleypriest]

@kelonye Can you please explain what you need to do this for? Are you adding "row-fluid" to the control-group?

[Deleted user]

@bradleypriest, was doing this http://goo.gl/HLyAs which isn't great, made this PR.