Remove a lot of warnings (considered as errors by dune).

As far as ldbg is concerned, it only traces the toplevel node, at
call event.

Note that I needed to rename quite a lot of modules to avoid name clashes
between lus2lic.a and ltop.

I've also merged the Verbose module with the one of Lutin so that
they can be shared (there were sharing 95% already).

nb: les tests ne passent toujours bien sur.

* Partie lus -> AST

predef.ml -> srcPredef.ml
syntaxTreeCore.ml -> astCore.ml
syntaxTree.ml     -> astV6.ml
syntaxTreeDump.mli-> astV6Dump.mli

* Partie Ast -> Ast

solveIdent.mli -> astRecognizePredef.mli
syntaxTab.mli -> astTab.mli
symbolTab.mli -> astTabSymbol.mli

* Partie  AST -> lic (static evaluation)

eff.ml  -> lic.ml
getEff.mli -> ast2lic.mli
lazyCompiler.mli -> licTab.mli
builtIn.ml -> licMetaOp.ml
predefEval*.ml -> licEval*.ml
name.mli -> licName.mli

* Partie Lic -> Lic

uniqueOutput.mli      -> l2lCheckOutputs.mli
structArrayExpand.mli -> l2lExpandArrays.mli
nodesExpand.mli       -> l2lExpandNodes.mli
doNoPoly.ml           -> l2lRmPoly.ml
doAliasTypes.ml       -> l2lAliasType.ml
doSplit.ml            -> l2lSplit.ml

This is useful to be able to compile V4 program that uses include.

cf test/should_work/NONREG/fresh_name.lus

where the local variable _n1e1_1 was defined twice !

The fix contist the following idea : prefix fresh var name by "_",
   except if at least one user ident begins by "_". In that case, we
   try to prefix them by "_1", and then "_2", and so on. We take the
   first possible one.

   nb : this won't work if the user defined idents from "_1" to
   "_1073741823" (on 32-bits machine), but I bet that this compiler
   would die before anyway...

by position). Rename ExpandPack into InstanciateModel.

Also, in verbose mode, print the full path of the openned files.

change is
	- make the parser simpler
	- make the compilation simpler
	- make everything simpler actually...
	- accepts more correct programs.
	- etc.

Indeed, before, we had specific syntax nodes for
	- extern nodes
	- aliased nodes
	- abstract nodes
	- normal nodes
which leads to duplicate code everywhere. Now, we have a more generic
representation.

The nice thing is that the parser is much simpler, and a lot of
duplicated code is avoided (for example, extern and abstract nodes do
now share the same code).

The bad thing is that we have more "assert false" lying everywere due
to this «too rich» representation, in order to deal with cases
that can never happen. For exemple, we have to do something with
nodes that have  both an alias and a body. This cannot happen of
course, so we issue an "assert false", which is a little bit painful,
as it have been rejected by the parser anyway.

Moreover, for some reason, external node params could not be clocked,
and cannot have static params. Maybe it is not possible to compile
such nodes (I don't know yet), but we should not raise a syntax error IMHO.

Somehow, what was done was very similar to ask the parser to perform type
checking.

	 oper -> node
	 func -> extern node
	 node -> (user) node

	 CALL_BY_NAME -> STRUCT_n
	 STRUCT_EXP_n -> STRUCT_anonymous_n
	 flaged -> flagged

src/syntaxTreeCore.ml (new file)
	Split      syntaxTree.ml      into     syntaxTree.ml      and
	syntaxTreeCore.ml. The idea is that lic2loc should be able to
	use syntaxTreeCore.ml verbatim.

src/lxm.ml
src/lxm.mli
	remove pack_name from  this module, so that it  can be shared
	with  lic2loc too  (this is  mandatory  since it  is used  by
	SyntaxTreeCore)

src/compile.ml
src/compiledData.ml
src/evalConst.ml
src/evalConst.mli
src/evalType.ml
src/evalType.mli
src/expandPack.ml
src/lazyCompiler.ml
src/main.ml
src/parser.mly
src/symbolTab.ml
src/symbolTab.mli
src/syntaxTab.ml
src/syntaxTreeDump.ml
src/syntaxTreeDump.mli
src/test/Makefile
src/test/packs.lus
src/test/test.res.exp
	opening SyntaxTreeCore  module, and inline  the definition of
	Lxm.pack_name.

	Also,  begin  to  replace  oper  by node  or  predef_node  in
	identifiers, in order to get a more consistant naming scheme.

	Try to split this 400 lines (!) function.
	+ Factorize some duplicated code.

ParserUtils.flat_flaged_list -> ParserUtils.flat_flagged_list

Ident.t is now an abstract data type (instead of a string).
fullid is turned into an Ident.long, and is also made abstract.

Add basic regression tests.

Add "assert false" statements everywhere it was necessary.

Add the fby operator in the syntax.

	new file:   src/.compile.ml
	modified:   src/TAGS
	modified:   src/main.ml
	modified:   src/syntaxe.ml

 Changed but not updated:
   (use "git add/rm <file>..." to update what will be committed)

	deleted:    src/doc/html/EvalConst.html
	deleted:    src/doc/html/EvalType.html
	deleted:    src/doc/html/ExpandPack.html
	deleted:    src/doc/html/LazyCompiler.html
	deleted:    src/doc/html/Lxm.html
	deleted:    src/doc/html/SrcTab.html
	deleted:    src/doc/html/SymbolTab.html
	deleted:    src/doc/html/Verbose.html
	deleted:    src/doc/html/index.html
	deleted:    src/doc/html/index_attributes.html
	deleted:    src/doc/html/index_class_types.html
	deleted:    src/doc/html/index_classes.html
	deleted:    src/doc/html/index_exceptions.html
	deleted:    src/doc/html/index_methods.html
	deleted:    src/doc/html/index_module_types.html
	deleted:    src/doc/html/index_modules.html
	deleted:    src/doc/html/index_types.html
	deleted:    src/doc/html/index_values.html
	deleted:    src/doc/html/style.css
	deleted:    src/doc/html/type_EvalConst.html
	deleted:    src/doc/html/type_EvalType.html
	deleted:    src/doc/html/type_ExpandPack.html
	deleted:    src/doc/html/type_LazyCompiler.html
	deleted:    src/doc/html/type_Lxm.html
	deleted:    src/doc/html/type_SrcTab.html
	deleted:    src/doc/html/type_SymbolTab.html
	deleted:    src/doc/html/type_Verbose.html
	deleted:    src/lpp.prj
	deleted:    src/md5.ml
	deleted:    src/ocamldoc.out
	deleted:    src/parser.output
	deleted:    src/t.ml
	deleted:    src/v.ml
	deleted:    src/xx.ml