RTTI is supported by any decent compiler and with the mandatory c++11 support
we are no longer supporting older compilers anyway.

include/cppunit/portability/config-msvc6.h:
* include/cppunit/portability/Portability.h: Added macro 
CPPUNIT_UNIQUE_COUNTER on MSVS 7.0+ using __COUNTER__ to
fix bug #2031696.

src/cppunit/TestAssert.cpp (assertDoubleEquals): Moved finite & NaN
tests to include/cppunit/portability/FloatingPoint.h. Changed
implementation assertDoubleEquals to explicitly test for NaN
in case of non-finite values to force equality failure in the
presence of NaN. Previous implementation failed on Microsoft
Visual Studio 6 (on this platform: NaN == NaN).
* examples/cppunittest/TestAssertTest.cpp: Add more unit tests to
test the portable floating-point primitive. Added missing
include <limits>.

* include/cppunit/portability/Makefile.am:
* include/cppunit/portability/FloatingPoint.h: Added file. Extracted
isfinite() from TestAssert.cpp.

* include/cppunit/config-evc4:
* include/cppunit/config-msvc6: Added support for _finite().

include/cppunit/config/SourcePrefix.h: disable warning #4996
(sprintf is deprecated) for visual studio 2005.

* include/cppunit/TestAssert.h: use sprintf_s instead of sprintf for
visual studio 2005.

* examples/ClockerPlugIn/ClockerPlugIn.cpp
* examples/DumperPlugIn/DumperPlugIn.cpp: use SourcePrefix.h. Fixed
wrong macro usage to implement DllMain.

* examples/msvc6/HostApp/ExamplesTestCase.h
* examples/msvc6/HostApp/ExamplesTestCase.cpp
* examples/simple/ExamplesTestCase.h
* examples/simple/ExamplesTestCase.cpp: removed divideByZero test case
as it cause some crash on some platforms.