Update to startup times plot.

Main changes:

- Created a new plot for startup times and health indicators (FHRPlot in fhr.js) with corresponding CSS styles. Some additional features not intended for the first version are left commented out.
- Updated data packaging method as getGraphData() in data.js.
- Created generate-basic.py to generate the en-US version of the page without worrying about localizaton (for testing purposes).
- Added reference to d3.v3.min.js in index.html (and added to js folder). 
- Updated yaxis label to be positioned relative to the graph rather than the outer graphbox.