Clean examples.

bench/bench

bench/programs/bad-typing/166_non_val_constants.mlw

examples/bad-bts/95_char_encodings.mlw

...ision/valuation/valuation-Valuation-valuation_split_1.agr

...ision/valuation/valuation-Valuation-valuation_split_1.why

examples/misc/encodebench.rc

examples/misc/list.why

examples/misc/prgbench.rc

examples/misc/set.why

examples/misc/test.equlin

examples/misc/vacid_sort.why

examples/nistonacci/why3session.xml

examples/nistonacci/why3shapes.gz

examples/tests-provers/polypaver.mlw