merge of the branch 'modules'

.gitignore

Makefile.in

bin/.gitignore

examples/use_api.ml

share/emacs/why.el

src/bench/.gitignore

src/bench/benchrc.ml

src/bench/whybench.ml

src/coq-plugin/whytac.ml

src/core/env.ml

src/core/env.mli

src/ide/gconfig.ml

src/ide/gmain.ml

src/main.ml

src/parser/denv.ml

src/parser/denv.mli

src/parser/lexer.mli

src/parser/lexer.mll

src/parser/typing.ml

src/parser/typing.mli