New FamilyProduct class to get information about l1c, l2a, cloudmask and indice products in database from an identifier string

Added the possibility to copy l2a sideproducts to cloudmask folder while computing l2a, for l2aproduct, tile, and job. Added the possibility to process more than one cloudmask in Job task

added possibility de copy l2a side products for products, tile, multiprocessing, etc. Modifying Job to copy these side products while generating l2a

set empty list for indices not produced to avoid error Tile has no attribute 'ndvi'(if ndvi was never computed)

added the possibility to compute CM001, CM002 and CM004 cloud masks if L2A is missing and cloud probability and / or scene classification is present in cloud mask folder. CM003 still needs L2A B11 and cannot be computed

Jobs: removed duplicates from process lists, indices: removed *.tif.aux.xml while removing raw tiff files, put indice names to lower in places for compatibility