Merge branch 'feature/wp/base-offset' into 'master'

src/plugins/wp/MemMemory.ml

src/plugins/wp/MemMemory.mli

src/plugins/wp/MemTyped.ml

src/plugins/wp/share/coqwp/Memory.v

src/plugins/wp/share/why3/frama_c_wp/memory.mlw

src/plugins/wp/tests/wp_acsl/base_offset.i

src/plugins/wp/tests/wp_acsl/oracle/base_offset.res.oracle

...ins/wp/tests/wp_acsl/oracle_qualif/base_offset.res.oracle

...t.1.session/script/init_t2_bis_v2_assigns_exit_part2.json

...1.session/script/init_t2_bis_v2_assigns_normal_part2.json

...t.1.session/script/init_t2_bis_v2_loop_assigns_part2.json

...t.1.session/script/init_t2_bis_v2_loop_assigns_part3.json