Allow for different instances of a gadget to have their own configuration

src/Board.js

src/HorizontalGauge/RosHGauge.js

src/InteractionTrace/InteractionTrace.js

src/InteractionTrace/RosInteractionTrace.js

src/LatestInteraction/RosLastestInteraction.js

src/LineChart/RosLineChart.js

src/MemoryRanked/MemoryRanked.js

src/MemoryRanked/RosMemoryRanked.js

src/Mood/RosMood.js

src/VideoStream/index.js