Added comments
Testing push
Finished subroutine send_particles (Alban)
Worked on initial and rho
First attempt at update_particles
attemp at merging conflict
Update particle positions for case leaving cube
Added comments
Add init_xv_test for testing purposes.
Merge changes between subroutines send and update
Completed init, rho, almost done writing
added skeleton code for setup_kernels
Merge branch 'master' into group2
added skeleton code for second transpose in pencil forward
Debugged version1.
finished kernel initialization
Merging conflicts from kernel work
Changed the writing function.
Added comments, made it neat, formatted string.
Added one last comment.