Deprecate test tools

Here is the list of deprecated test tools used in previos version of Boost.Test and their new analogs:

Old tool New analog tool
BOOST_BITWISE_EQUAL( l, r ) BOOST_CHECK_BITWISE_EQUAL( l, r)
BOOST_MESSAGE( message ) BOOST_TEST_MESSAGE( message ) see Test Log documentation for this facility
BOOST_CHECKPOINT( message ) BOOST_TEST_CHECKPOINT( message ) see Test Log documentation for this facility

The main reasons for making these changes were uniformity and better place for log specific tools (plus old tools names were too generic for test framework). Old deprecated names are still accepted but may be excluded in a future releases.