added plot scripts that I started on another computer and data for plotting
added proper way to output plot to a file, created plot1.png, added plot creation to first 3 plot R-scripts
completed script for plot 2, began work on plot3, output plot2 to png
completed code for plot3 and generated plot3.png
subset and rewrote household_power so it would go to github and could sit in current directory and load faster