plot_shock_decomposition stores info of plotted variables. This can be...

plot_shock_decomposition stores info of plotted variables. This can be optionally used by squeeze_shock_decomp to store in oo_ only variables plotted so far. Users can optionally define the list of vars to sotre in squeezed oo_ for shock decomps. Also allow aoa plots for lists of input variables. fixed error in wrong field name var_type of q2a. fixed aoa call, storing the wrong decomp data for interactive mode.