Merge pull request #212 from mozilla/feature/freeze-mode

package.json

src/App.js

src/assets/hud/avatar.jpg

src/assets/hud/avatar.png

src/assets/hud/bubble_off-hover.png

src/assets/hud/bubble_off.png

src/assets/hud/bubble_on-hover.png

src/assets/hud/bubble_on.png

src/assets/hud/freeze_off-hover.png

src/assets/hud/freeze_off.png

src/assets/hud/freeze_on-hover.png

src/assets/hud/freeze_on.png

src/assets/hud/mute_off-hover.png

src/assets/hud/mute_off.png

src/assets/hud/mute_on-hover.png

src/assets/hud/mute_on.png

src/assets/hud/muted.png

src/assets/hud/unmuted.png

src/assets/stylesheets/2d-hud.scss

src/components/freeze-controller.js