Sizeless vectorization

.gitlab-ci.yml

pystencils/alignedarray.py

pystencils/backends/arm_instruction_sets.py

pystencils/backends/cbackend.py

pystencils/backends/riscv_instruction_sets.py

pystencils/backends/simd_instruction_sets.py

pystencils/backends/x86_instruction_sets.py

pystencils/cpu/cpujit.py

pystencils/cpu/vectorization.py

pystencils/data_types.py

pystencils/include/philox_rand.h

pystencils_tests/test_conditional_vec.py

pystencils_tests/test_random.py

pystencils_tests/test_vectorization.py

pystencils_tests/test_vectorization_specific.py