JPSSnagg

src/nagg_main.c:
    Changed productname to products_list (single product name to list of products.)
    Added outputfiles to hold a list of output file names.
    Added temporary code to call start_write with hardset data.
src/nagg.h:
    Changed some macro definitions to reflect they are for:
       NPP:  e.g., NPP_Product_max, NPP_Geo_Location_max
       NAGG tool: NAGG_Product_list_max,  NAGG_outputfiles_max
    Added definitions for compose_output_fname but not completed.
src/nagg_posix.h:
    more posix functions macros.
src/nagg_write_granules.c
    Added creationdate and creationtime to the start_write parameters.
    Fixed code to accept outfiles as char **.
src/nagg_options.c
    Fixed -t option to store arguments in a list of products.
src/nagg_select_granules.c
    Added compose_output_fname() but not working yet.
src/nagg_product.c
    Renamed NAGG_Product_max to NPP_Product_max.