[svn r56] Initial support for TypeInfo.

Enums not work.
Several other bugfixes.

test/bug27.d

@@ -0,0 +1,17 @@
+module bug27;
+
+int func(int a, int b)
+{
+    if (a == b)
+        return 0;
+    else if (a < b)
+        return -1;
+    else
+        return 1;
+}
+
+void main()
+{
+    int i = func(3,4);
+    assert(i == -1);
+}