CppUnit - C++ port of JUnit Code

* examples/hierarchy/BoardGameTest.h:
* examples/hierarchy/ChessTest.h: fixed compilation issue, prefixed access
to class member with 'this' (inheriting from template parameter
dependent class).

* src/cppunit/Win32DynamicLibraryManager.cpp: integrated patch #1024428,
MinGW compilation under Windows XP.

* include/cppunit/Message.h
* include/cppunit/SourceLine.h:
* src/cppunit/Message.cpp:
* src/cppunit/SourceLine.cpp: provided thread-safe copy constructor on
platform that do not provide thread-safe copy constructor for std::string.

* added specific copy constructor implementatin to ensure string buffer are detached during copy (therefore providing thread-safe copy constructor for non thread-safe std::string copy constructor implementation).

* added new line at the end of the file.

* include/cppunit/TestAssert.h: fixed portability bug pointed out by
Neil Ferguson.

* include/cppunit/Portability.h: fixed EVC++ 4 detection.

* include/cppunit/TestAssert.h: integrated Neil Ferguson patch for high
precision conversion to string for double number. Modified the patch
to works even if DBL_DIG C99 macro is not defined.

* added syncmail to send changelog to cppunit-cvs mailing-list

* include/cppunit/TestAssert.h:
* src/cppunit/TestAssert.cpp: integrated Neil Ferguson patch for missing
_MESSAGE assertion variants. Also enhanced the failure message of a
few assertions.