- Implement xp::null() (BC) - Copy implementation of xp::stringOf() from XP4
- Implement xp::null() (BC)
- Copy implementation of xp::stringOf() from XP4

git-svn-id: 526f3b90ad6d9b1dfe840af828070ca3d99521ac@7981 d2cacbed-c0f6-0310-851a-9dad52fc623a

johannes85/core