CSS coding conventions

[ischommer]

see http://trac.silverstripe.com/silverstripe/changeset/40575/modules/cms/branches/gsoc/css/cms_right.css

there shouldn't be any "toplevel"-rules without an id/class namespace inside the cms, as it means too many side-effects.

// bad
.originallang {}
// good
#i18nModule .originallang {}