tests and bugfixes: fns take aliases, fixed binary arithmetic in create, eliminated wasted bit per uint

src/comp/driver/rustc.rs

@@ -5,8 +5,12 @@ import front.token;
 import middle.trans;
 import middle.resolve;
 
+import util.bits;
+
 io fn main(vec[str] args) {
 
+  bits.test();
+
   log "This is the rust 'self-hosted' compiler.";
   log "The one written in rust.";
   log "It does nothing yet, it's a placeholder.";