Testing additional attributes

So I took a stab at changing the circle radii by the price, and also
adding an outline to the circles to more clearly see them when they
overlap. Fun stuff -- I wish XCode was a better IDE, though.
Prettied it up a bit

Just changed a bit of the CSS and added placeholders in the HTML for
our different view/control elements.
Color changing

Further practice changing attributes of the circles based on the data
values.
Try as I might, I couldn't get d3.max or d3.min to work properly on the
"price" object -- they wouldn't throw errors, but the values they
returned weren't right either.
Changed title/subtitle
Added cleaned CSV data files and converter

The converter is just for future reference.
Further cleaning of data files
Further cleaning
Added another chart

Changed d3.js to input a real data file, created additional fields for
the JSON object, and created a new function to create the line graph.
Line Chart and Bubble Plot Updated

Got the line chart and bubble plot working decently with the real data,
I think.
Basic Filtering on the Scatter Plot

Couldn't get it to work on the line graph, after hours of
trying/googling.
Another failed attempt at the line graph