multiple data_requests and multiple shot_numbers as input
It may be useful if the users can define the data_request as a list of keywords/param_names they want to get and call:
out = gdat(shot,{'ip','q0',...}) or even as for several shots for the comparison: out = gdat([shot1, shot2, ... ],{'ip', 'q0'},1) The output out may be in form of a structure, for example out.shot1.ip, out.shot1.q0, etc. And eventually the users can obtain a plot with subplots of all the params they ask for.