CppUnit - C++ port of JUnit Code

moved dll copy from post-build to custom build setting, so that the
dll is copied even if the CppUnitTestApp was not modified.

* examples/msvc6/TestPlugIn/: a new example of test plug in.

* src/msvc6/TestRunner/ListCtrlFormatter.*
* src/msvc6/TestRunner/ListCtrlSetter.*:
added, helper to manipulate list control.

* src/msvc6/TestRunner/TestRunnerDlg.*: change to make the error list
more compact. text moved to string resources. icons added for typ
test tfailure type.

* src/msvc6/TestRunner/MostRecentTests.*: added, classes that will
replace the current implementation of MRU test which make it hard
to subclass the dialog.

* src/msvc6/TestRunner/res/errortype.bmp: added, bitmap with error
types (failure and error).

* src/msvc6/TestPlugInRunner/: A test runner to run test plug in.
Test plug in are DLL that publish a specified plug in interface.
Those DLL are loaded and reloaded by the TestPlugInRunner to run
tests. This remove the need to wrap DLL with a executable to test
them.

* src/cppunit/cppunit.dsp:
removed config.h from project
added Portability.h and config-msvc6.h

* include/cppunit/config-msvc6.h:
undef CPPUNIT_FUNC_STRING_COMPARE_STRING_FIRST