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Note: Currently, only the set of real theories has been fully converted to
the new script format. So it is the only one enabled. The other ones would
not survive the process.

Make its building rule a bit quieter.

Note: they are stable with respect to the following command.
why3 --realize -D drivers/coq-realize.drv -T toto.Titi -o lib/coq/toto/

Assumptions about the input file:

- The first lines up to the first empty line are supposed to have been
  generated automatically by Why3 and are discarded.

- Any Axiom, Parameter, or block of lines started by (* Why3 assumption *)
  is supposed to have been generated automatically by a previous run of
  Why3 and acts as a location marker. There is a name associated with the
  marker: the first meaningful identifier encountered by the parser, e.g.
  the world after Inductive.

- Any block of lines started by (* Why3 goal *) is supposed to have been
  automatically generated by Why3 up to a line ending by a point. The
  following lines are considered as user-edited content up to the first
  occurrence of Qed, Admitted, Defined, or Save. The location name is again
  extracted from the first meaningful identifier. The user content will be
  copied whenever Why3 prints a declaration with the same name.

- Any other line is supposed to be user content. It will be copied whenever
  Why3 prints some declaration with a name matching a further location.

Note that the parser is rather crude for now. It will presumably breaks bad
in presence of commands that are commented out or if the user got creative
with indentation. This should be considered as a proof of concept.

Moreover, it does not handle yet features like gallina definitions and
notations, which will be more user-friendly for realizing whole theories.

- change takes function as the first argument
- add_new takes exception as the first argument
- find_default is renamed to find_def and takes the default value
  as the first argument
- find_option is renamed to find_opt (to align with find_exn and find_def)
- default_option is renamed def_option

Conflicts:
	Makefile.in
	src/bench/benchdb.ml
	src/bench/benchrc.ml
	src/driver/whyconf.mli
	src/ide/gconfig.ml
	src/ide/session.ml
	src/main.ml