Add d3js to the app dependencies.
Add the SVG that will be use as background for the graphs
Add css to style SVG elements.
Add SVG CSS to index.html.
Add D3 to index.html
Replace the image by the div that will contain the SVG
Add an SVG controller that load the SVG background
Change Green House controller to get the dataset for SVG.
Add a one second clock.
Add constants to draw graphs.
Init the graph.
Update the graph.