* Reverted [pos.mli] to the previous signature, except [Pos.min]
that now takes a labelled parameter [file].
* Reverted [ParserAPI.ml] to the previous signature.
* Reexported [shor_error] in [ParserUnit].
* Changed the modules [LexToken] so that they export one function
to make attributes, the first, additional paramater being "[@"
or "[@@" (and invalid in PascaLIGO).
* Added support in all [ParserLog] for attributes (pretty-printings).
* Added AST nodes [Attr] and [AttrDecl] to PascaLIGO. The simplifier
takes care of hooking them with their respective declarations
or discarding them. (In the future, we should issue a warning for detached
attributes.)
* [CameLIGO/ReasonLIGO] The AST node [EAnnot] (expressions
annotated by a type) now records the region in the source
code for the colon.
* [CameLIGO/ReasonLIGO/PascaLIGO] I added the syntax
%token <...> TOKEN "lexeme"
* [ReasonLIGO] I changed the AST nodes [Mtz] and [Str] to
[Mutez] and [String], respectively (in accordance with the
PascaLIGO front-end). I changed token [DOTDOTDOT] to
[ELLIPSIS].
* [ReasonLIGO] I added what was missing to make a loca build
with my Makefile.
