New packages: ocamlclean, ocapic, ocamlcc and ocamlpp.

I suggest to include my four new packages:
 * ocamlclean: an OCaml bytecode executable file cleaner
 * ocapic: running OCaml on PIC microcontrollers
 * ocamlcc: OCaml to C compiler
 * ocamlpp: OCaml .byte and .cmo pretty-printers

Best regards,
Benoît Vaugon.