Improve HierarchyNode.AddChild performance when inserting items at the end of the list
vsCommandStatusUnsupported (constant value 0) needs to use operator =, not operator |=
Disable the Copy, Paste, Cut, and Rename commands on linked file nodes
Merge pull request #17 from sharwell/addchild-performance

Improve HierarchyNode.AddChild performance when inserting items at the end
Merge pull request #18 from sharwell/disable-cmds

Disable unsupported commands