Generate Position Independent Code in ExternalProject Voro when necessary

Replace deprecated CUDA functions calls in GPU package

Fix rcb balance issue

Kokkos vs gpu direct

bug fix for compute cluster/atom when computing values used to update…

This is for consistency with other parts of LAMMPS where
such variables have "flag" in their name. Also reduces
confusion with have_gpu_direct() function.

When we can safely detect, that GPU-direct is not available,
change the default setting of Kokkos::gpu_direct_flag from 1 to 0

KOKKOS Package bugfix: Workaround for issue #1037

Add extra check for OpenCL timers

enable more correct natoms computation when atoms are lost

USER-UEF support for image flags

this adds a local wrapper function have_gpu_direct(), that informs about
the support for GPU-direct, if possible and add a warning message in case
it cannot be detected or is not available and using more than 1 MPI rank.

Fixes issue #1034 by preventing time() to access non-existent OpenCL events

replace Section_commands.txt file

bug-fix for slope() function in variable

Allow cross-compiling from linux to windows with cmake

changes for Intro and Howto doc pages