Add module handling

[philiph-slac]

We need to handle modules (aka segments, aka the first index in the data array) correctly. Since ePixHR has shape (1, m, n) I didn't put loops over module into the suite scripts. ePixM will have shape (4, n, m) not (1, 2n, 2m). We need to be able to loop handle pedestals, slices, single pixels appropriately. For some detectors it will be computationally painful from a memory perspective to look at all modules in one job. E.g. cluster-finding for a camera like the epix10k2M. In others it will be simpler to make a .npy file or ntuple-like storage with the module number. To handle this we need to add loops over a list of modules to analyze; this list can be all modules or one. The basicSuiteScript must be modified to handle this information and to plot and save data products with the appropriate labeling.