Data retrieved Aug 9th, 2014 at the SF Ethics / Campaign Finance hackathon.
I did little to this visualization other than changing the data from that used in the original gist.
Original gist's description: This example demonstrates loading of CSV data, which is then quantized into a diverging color scale. The values are visualized as colored cells per day. Days are arranged into columns by week, then grouped by month and years. Colors by Cynthia Brewer. Layout inspired by Rick Wicklin and Robert Allison.