merging with master

CMakeLists.txt

Jenkinsfile_numerics_mpi

configure

example/Vector/1_gpu_first_step/main.cu

example/Vector/7_SPH_dlb/main.cpp

example/Vector/7_SPH_dlb_gpu_opt/main.cu

images/CMakeLists.txt

install

script/update_openfpm

src/CMakeLists.txt

src/Vector/cuda/vector_dist_cuda_func_test.cu

src/Vector/tests/vector_dist_cell_list_tests.cpp

src/Vector/vector_dist_comm.hpp

update

upgrade