updates from styleguide feedback. Refs bug 863160
adding fcaptions for on/off switches. refs bug 885818. Renaming feura to fira. refs bug 870998.
renaming feura to fira. refs 870998
alignment of images and captions. refs bug 885818
Firefox OS Lists. refs bug 889293
updates to lists page. refs bug 889293
style guide updates based on feedback in bug 863160