Thanks for the newly added plt.tight_layout function to the master mpl
branch. This saves me from manually adjusting the spacing around the figure
canvas each time I need to use the full available figure space. For this I
was switching from Qt4Agg to WXAgg backend, so that I was able to read
right/left/top/bottom/hspace/wspace parameters numerically and then feed
into plt.subplot_adjust function. I guess there is no need for this long
path with the addition of this new adjuster function.