[svn r56] Initial support for TypeInfo.

Enums not work.
Several other bugfixes.

test/enum3.d

@@ -0,0 +1,15 @@
+module enum3;
+
+enum GE : ushort
+{
+    A,B,C
+}
+
+void main()
+{
+    GE e = GE.B;
+    size_t s = GE.sizeof;
+    assert(e == 1);
+    assert(e.sizeof == s);
+    assert(s == 2);
+}