version 0.9.3:
  - Supports OCaml version 3.07. (work around for 3.07 camlp4 bug)

version 0.9.2:
  - Supports OCaml version 3.07+ beta1.

version 0.9.1:
  - Bug fix:
     Parsing of regular expression failed when "(?:)" appears at the
     beginning of the expression.
     Thanks Mark McLauchlan for bug report.

  - Supports OCaml version 3.06+37.

version 0.9.0:
  - First public release.