ORakuda, Perlish string literals in OCaml

ORakuda is a small library, CamlP4 extensions and an optional tiny patch to CamlP4 which provides a handy way to write OCaml scripts a la Perl (or other scripting language). It provides syntax like:

• PCRE expression and matching of Perl like syntax $/.../ or <:m<...>>
• Variable and expression references in string $"..." or <:qq<...>>
• Sub-shell call by back-quotes $... or <:qx<...>>
• Easy hashtbl access tbl${key}