stdlib: Inference engine caught some type errors! Also added some hot garbage.

stdlib/std.cl

@@ -2,14 +2,19 @@
 
 pub mod preamble {
     pub use super::{
+        io::*,
         num::*,
         option::Option,
         range::{RangeExc, RangeInc},
         result::Result,
-        str::str,
+        str::*,
     };
 }
 
+pub mod ffi;
+
+pub mod io;
+
 pub mod num;
 
 pub mod str;
@@ -20,5 +25,5 @@ pub mod result;
 
 pub mod range;
 
-#[cfg("test")]
-mod test;
+// #[cfg("test")]
+// mod test;