Moved legend to the right side, added citation

data_visualisation.py

@@ -47,6 +47,7 @@ plt.rcParams["figure.figsize"] = (16,9)
 plt.rcParams["lines.markersize"] = 8
 plt.yscale('log')
 plt.grid(True)
+plt.subplots_adjust(right = 0.8)
 
 x = df_transistors.year
 y = df_transistors.transistors
@@ -74,7 +75,20 @@ plt.legend(["Transistors (thousands)",
             "Typical power (Watts)", 
             "Number of logical cores"], 
            loc = "upper left",
+           bbox_to_anchor=(1.0, 1.0),
            fontsize = "medium")
 
+plt.text(100, 100, "This is a text")
+
+plt.text(0.805, 0.155, 
+         "Original data up to the year 2010 collected and plotted by\nM.   Horowitz, F. Labonte, O. Shacham, K. Olukotun, \nL. Hammond, and C. Batten.", 
+         fontsize = "x-small", 
+         transform=plt.gcf().transFigure)
+
+plt.text(0.805, 0.125, 
+         "New plot and data collected for 2010-2017 by K. Rupp.", 
+         fontsize = "x-small", 
+         transform=plt.gcf().transFigure)
+
 plt.savefig("data_visualisation.png", dpi = 300, orientation = "landscape", papertype ="a4")
 plt.show()