CodingGuideLines.txt: added. CppUnit's coding guidelines for portability.

* include/cppunit/portability/CppUnitStack.h: added. wrapper for std::stack.

* include/cppunit/portability/CppUnitSet.h: added. wrapper for std::set.

* include/cppunit/ui/text/TestRunner.h: fixed namespace definition for
deprecated TestRunner.

* include/cppunit/TestAssert.h:
* src/cppunit/TestAssert.cpp: removed old deprecated functions that did
not use SourceLine. Moved assertEquals() and assertDoubleEquals() into
CppUnit namespace.

* src/cppunit/TestFactoryRegistry.cpp: use CppUnitMap instead of std::map.

* src/DllPlugInTester/CommandLineParser.h: use CppUnitDeque instead
std::deque.

* examples/cppunittest/*.h:
* examples/cppunittest/*.cpp: removed all usage of CppUnitTest namespace.
Everything is now in global space.

* examples/*/*.h:
* examples/*/*.cpp: replaced usage of CppUnit:: with CPPUNIT_NS::.

* examples/ClockerPlugIn/ClockerModel.h: use CppUnit STL wrapper instead
of STL container.