LayoutNote should not be valid when there is no layout
LayoutNote should not be valid when there is no layout

josevalim/rails-footnotes,jasnow/rails-footnotes,kbrock/rails-footnotes,SciMed/rails-footnotes,oakbow/rails-footnotes,oakbow/rails-footnotes,jasnow/rails-footnotes,josevalim/rails-footnotes,josevalim/rails-footnotes,jasnow/rails-footnotes