converter: unwrap #gradient
converter: small change
converter: $parent hack for responsive-in?visibility in mixins
converter: responsive-utilities $parent hack
converter: extract #apply_mixin_parent_selector
converter: flatten_mixins fix + .close button& extraction
converter: de-nest rule helper
converter: ruby < 2 does not have Range#size
Merge pull request #401 from glebm/converter-walk-less

converter: unwrap #gradient, @mixin $parent, .close button&