Capturing mysql function changes.
Created new Date2 field that includes POSIXct formatted date/time data type (see http://www.noamross.net/blog/2014/2/10/using-times-and-dates-in-r---presentation-code.html).

Also created blank plot1.R file.
Added plot1.png output to be placed into GitHub.

Updated plot1.R to generate the correct plot in plot1.png.