Downcase std modules again, move to :: for module dereferencing

This should be a snapshot transition.

src/lib/rand.rs

@@ -0,0 +1,34 @@
+/**
+ * Bindings the runtime's random number generator (ISAAC).
+ */
+
+native "rust" mod rustrt {
+    type rctx;
+    fn rand_new() -> rctx;
+    fn rand_next(rctx c) -> u32;
+    fn rand_free(rctx c);
+}
+
+type rng = obj { fn next() -> u32; };
+
+fn mk_rng() -> rng {
+    obj rt_rng(rustrt::rctx c) {
+        fn next() -> u32 {
+            ret rustrt::rand_next(c);
+        }
+        drop {
+            rustrt::rand_free(c);
+        }
+    }
+
+    ret rt_rng(rustrt::rand_new());
+}
+
+// Local Variables:
+// mode: rust;
+// fill-column: 78;
+// indent-tabs-mode: nil
+// c-basic-offset: 4
+// buffer-file-coding-system: utf-8-unix
+// compile-command: "make -k -C .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
+// End: