src/cppunit/PlugInManager.cpp: fixed bug in unload().

* include/cppunit/TypeInfoHelper.h:
* src/cppunit/TypeInfoHelper.cpp: Implementation is now always available
is CPPUNIT_HAVE_RTTI is not 0. This removes the need to use
different libraries. CPPUNIT_USE_TYPEINFO_NAME can be set on a
case by case basis for HelperMacros.

* src/cppunit/TestFactoryRegistry.cpp: removed unused include of
TypeInfoHelper.h.

* include/cppunit/TextTestProgressListener.h:
* src/cppunit/TextTestProgressListener.cpp: used endTest() instead
of done() to finalize.

* src/msvc6/TestPlugInRunner/TestPlugIn.h:
* src/msvc6/TestPlugInRunner/TestPlugIn.cpp: updated to use the
new test plug-in system.

* examples/simple/SimplePlugIn.cpp:
* examples/simple/simple_plugin.dsp: crossplatform test plug-in
example using 'simple'.

* examples/msvc6/EasyTestPlugIn/*: projects replaced with the
crossplatform projecct examples/simple/simple_plugin.dsp.