* feat(display-name): convert to React
- Create a new React Component for displaying and updating display
names on small videos
- The updating of the Component is defined in the parent class
SmallVideo, which children will get access to through prototype
copying
- Create a new actionType and middleware so name changes that occur
in DisplayName can be propogated to outside redux
- Update the local video's DisplayName when a conference is joined
or else the component may keep an undefined user id
* squash: query for the container, not the el owned by react
928181cd7a