upgrade to NUnit 2.5.2
upgrade to NUnit 2.5.2

git-svn-id: 9499ca894a8a68cdff32de8c8c545ddc6cb0944b@352 458802cb-8328-0410-b1d9-a76001e3bb52

wallymathieu/XmlUnit,wallymathieu/XmlUnit,wallymathieu/XmlUnit,wallymathieu/XmlUnit,wallymathieu/XmlUnit