caa_download: consistent behavour of flags inventory,list,listdesc
c_coord_trans: removed usage of isdat
c_caa_var_get: bug fixes
c_caa_cef_var_get: bug fixes
caa_download: fix format issue for CSA and inventory time request
caa_download: fixed async download from CSA
caa_download: .tar.gz filenames used in CSA can be given as input