cholera_outbreak visualization code

cholera_outbreak/cholera_outbreak.pyde

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+def setup():
+    size(1000, 911)
+    img = loadImage("mapclean.jpg")
+    background(0)
+    image(img, 0, 0)
+
+def draw():
+    table = loadTable("snow_pixelcoords.csv", "header")
+    for row in table.rows():
+        count = row.getInt("count")
+        x_screen = row.getFloat("x_screen")
+        y_screen = row.getFloat("y_screen")
+        if count == -999:
+            fill(0, 0, 256)
+            rect(x_screen, y_screen, 10, 10)
+        else:
+            fill(256, 0, 0)
+            circle(x_screen, y_screen, count*2)