Added quickrefs for dictionaries, getting started with arrays, for, matrices, other plots, savefig, using python modules.
Creating a linear array:\\
{\ex \lstinline| x = linspace(0, 2*pi, 50)|}
Plotting two variables:\\
{\ex \lstinline| plot(x, sin(x))|}
Plotting two lists of equal length x, y:\\
{\ex \lstinline| plot(x, y)|}