[svn r123] Fixed some typeinfo module name mismatches.

Fixed D-style varargs returning through pointer.
Fixed converting nested function to delegate.
Added std.string and std.format to Phobos.

test/bug74.d

@@ -0,0 +1,12 @@
+module bug74;
+
+char[] sformat(char[] s, ...)
+{
+    TypeInfo[] ti = _arguments;
+    void* args = _argptr;
+    return "";
+}
+
+void main()
+{
+}

test/bug75.d

@@ -0,0 +1,13 @@
+module bug75;
+
+void func(void delegate() dg)
+{
+}
+
+void main()
+{
+    void nested() {
+    }
+    //func(&nested);
+    void delegate() dg = &nested;
+}