AE: Stop ROOT from printing a line for every plot it saves. Also, make the error and worning messages a bit more useful by stating the chapter name
AE: Make these warning more useful still
AE: Add the auto_zoom option which doesn't currently do anything
AE: Add the auto zoom functionality
AE: Check that we don't get the TString that we store in each directory
AE: Also zoom in on the negative side of the x-axis
Merge branch 'feature/AE_add-zoom-axis-fn-to-pic-book' into develop. Close issue #195.