TODO.

TODO

 * Document the recent additions (CHANGES + doc).
   - menhirLib: new functions
-      loop_handle_undo, shifts, acceptable
       find_default_reduction
       pop, top, equal, pop_many, get
       force_reduction
@@ -10,7 +9,6 @@
       current_state_number
     menhirLib: possibly incompatible change of type 'a env
     MenhirLib.Printers: incompatible type change of print_stack
-    deprecated streams, [stack], MenhirLib.General.
     MenhirLib.ErrorReports: new module
   - Send CompCert pull request.