Changed SVG to use string.format syntax

Rather than using .replace on a string, the code now assumes the SVG
file has string.format() formatted syntax. Thus the Python script
creates a dictionary using 0-4 naming convention to specify the days,
and the SVG can use the formatting mini-language to adjust presentation.
Updated coordinates in SVG template.

Also changed dates to be real dates, and Day of Week formatting is done
in SVG now.