port to vacpp:

  added default template arguments explicitly (Joaquin M Lopez)
  removed member template keyword (Toon Knapen)


[SVN r23109]

libs/tuple

@@ -1 +1 @@
-Subproject commit 78572fca7b2326acfb0b50866ddda19088a7fb71
+Subproject commit 63c93b59b43849299af91259c28c610e9461c6ae