documentation update

This version introduces multiple enhancements:

changed documentation links

Details of additions/deletions below:
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Modified:   README.md
            -- Updated --
                changed url to wiki documentation

Modified:   doc/BlueObject.md
            -- Updated --
                changed url to wiki documentation

Modified:   doc/Register.md
            -- Updated --
                changed url to wiki documentation

Modified:   doc/Xml.md
            -- Updated --
                changed url to wiki documentation