Revised: Added TotalEq/TotalOrd/Clone functionality and related tests to B-tree#11258

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niftynif wants to merge 2 commits intorust-lang:masterfrom niftynif:master

+294-111

Commits on Dec 30, 2013

Committing standard compare/to_str/clone features, but no tests yet.
niftynif
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Added more robust compare and equals for Branch and Leaf, as well
niftynif
committed