and add XML declaration for session.xml, shortcuts.xml & userDefineLang.xml for conforming to XML standard specs. Regarding the suggestions from #9339
Included values from Autocad 13 reference. Close #6000
git-svn-id: svn://svn.tuxfamily.org/svnroot/notepadplus/repository/trunk@591 f5eea248-9336-0410-98b8-ebc06183d4e3