[cosmic_rays] len() of CosmicRaysSets is nsets (before ncrs) / Iteration over Sets yields Base / Possible to create CosmicRaySets from list of CosmicRaySets

[cosmic_rays] Fix shape bug for CosmicRaysSets during automatic conversion (Teresa, please double-check)

[cosmic_rays] Rename the Data's container intern 'cosmic_rays' to 'shape_array'. To still load old data use the 'main_type' keyword of the load function

[cosmic_rays] Raising AttributeError when loading a Sets instance with the Base class and vice versa

Now CosmicRayBase is able to get information from physically similar keywords (no double saving of eg. pix and vecs)