added solutions for VerifyThis 2017

examples/verifythis_2017_maximum_sum_submatrix.mlw

...les/verifythis_2017_maximum_sum_submatrix/why3session.xml

examples/verifythis_2017_maximum_sum_submatrix/why3shapes.gz

examples/verifythis_2017_odd_even_transposition_sort.mlw

...rifythis_2017_odd_even_transposition_sort/why3session.xml

...verifythis_2017_odd_even_transposition_sort/why3shapes.gz

examples/verifythis_2017_pair_insertion_sort.mlw

examples/verifythis_2017_pair_insertion_sort/why3session.xml

examples/verifythis_2017_pair_insertion_sort/why3shapes.gz

examples/verifythis_2017_tree_buffer.mlw

...his_2017_tree_buffer/challenge4-Spec-VC_take_lemma_1.smt2

...this_2017_tree_buffer/challenge4-Spec-VC_take_lemma_1.why

examples/verifythis_2017_tree_buffer/why3session.xml

examples/verifythis_2017_tree_buffer/why3shapes.gz