[svn r56] Initial support for TypeInfo.

Enums not work.
Several other bugfixes.

test/bug29.d

@@ -0,0 +1,15 @@
+module bug29;
+
+void main()
+{
+    int[] arr16 = new int[4];
+    {
+        void[] arr = arr16;
+        {
+            printf("%lu\n", arr.length);
+            {
+                assert(arr.length == 16);
+            }
+        }
+    }
+}