FindPackageHandleStandardArgs needs to be included in every find module
that the find_package_handle_standard_args is used.  I was getting
transitively included by othger find modules before but when all other
options are turned off except DataMan, it's missing.  This ensures it's
always included before calling find_package_handle_standard_args.

Added ADIOS1 cmake build. Use ADIOS_ROOT=<adios 1.x install dir> cmake -DADIOS_USE_ADIOS1=ON to build.