why3ide.

Split itp_server into itp_server and server_utils for readability.
Split why3ide into why3ide and ide_utils for readability.

Also do following changes:
Changed printer to allow printing from label again.
changed callback of transformation so that creating node is always done
before updating it.
Added a root for coherence and easy
Clear the message zone for a demo.

Ide server compiles.
Gtk ide still does not compile.

Factor debug protocol functions.
Remade printing work for why3shell.
The Zipper was removed.

compile.

(ide) new_node returns the row_ref of new node. So that we can go to
the ggoal generated by transformation (convenience).
Changed the update of the proof_status in controller_itp. update_node
functions now take a callback called notification which is actually
P.notify (node_change).
Put type any inside session_itp.ml.

Removed duplicated code.
Handling of unrecoverable exception in treat_request so that server dont
get stuck.

Fixed monitor.
Moved History.

Changed Makefile to make it compile.

Can be tested using

bin/why3webserver.opt & firefox src/ide/index.html

Controller is now dummy until the first open request is given.

replay_print now takes a formatter.
Added messages and message_notification.
Added New_node.
Changing name of command request for disambiguation.
Changed parsing of IDE command line. (function interp).

Change many function from gconfig.ml to remove ref to Whyconf.
Add protocol file.
Add whats needed in an adhoc way.
Need cleaning. Compile but fails.

Adding a forgeting function for printing variables on exceptions.
Should do the same at least for patterns.
Adding printing functions from why3printer.
Changing exception in transformation so that they
return terms not strings.

Add a name_table in printer_args.
Put the definition of name_table in task.ml.
Build_name_tables only called once in proof_node creation.
Modified the rest accordingly.