(float litteral are not allowed in patterns since testing the equality of floats
 is a tricky business).
 While adding a test using OCaml's complex number module, fixed several bugs in the
 parser (for overloaded functions) and in the runtime.

labelled arguments. All monorphic modules the OCaml standard library are
available with the Stdlib prefix (e.g. Stdlib.Sys.file_exists).

This allows to write `Stdlib.List.map :: {Int Bool}`. The previous syntax,
`Stdlib.List.map with { Int Bool }` is ambiguous with the `match ... with` and needs
arbitrary look-ahead. It can still be written, with explicit parentheses.

Add a new flag --binarystub to allow creating the stubs in binary format instead of OCaml text source.

let x & t = is now allowed.

default to Latin1 for compatibility.