move(), move_backwards() algorithms, moved_range, move adaptor addon + copy_backward() test fix

1. Boost.Range version of boost::move() and boost::move_backward() using Boost.Move implementations of these algorithms - boost::move() and boost::move_backward().
2. moved_range wraps Boost.Move boost::move_iterator<>.
3. added adaptors::move() and moved forwarder.
4. Fixed error in copy_backward() test - wrong parameters were passed and wrong result was expected.