Perlish string literals in OCaml

ppx_orakuda is a small library, PPX extensions which provide 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 {m|...|m}
• Variable and expression references in string {qq|...|qq}
• Sub-shell call by back-quotes {qx|...|qx}