tests: Fixed tests for wchar_t mode, added dummy std::cout/wcout usage for...

tests: Fixed tests for wchar_t mode, added dummy std::cout/wcout usage for MSVC in order to create locales beforehand (avoids memory leaks during tests), minor additional test fixes

git-svn-id: http://pugixml.googlecode.com/svn/trunk@629 99668b35-9821-0410-8761-19e4c4f06640