libxmldiff-0.2.9

• Moved Windows build to vs2019
• Removed global 'using namespace std'
• Fix CData diff : added --special-nodes-ids and --special-nodes-before-value

libxmldiff-0.2.9beta

Fix CData diff : added --special-nodes-ids and --special-nodes-before-value

libxmldiff-0.2.8

Fix memleak signaled by Andrey Paraskevopulo