implemented Clone trait for Surface#136

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Xirdus wants to merge 3 commits intobrson:masterfrom

Commits on Aug 1, 2014

implemented Clone trait for Surface
Xirdus
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Commits on Aug 11, 2014

Merge branch 'key-ord'
Xirdus
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Commits on Aug 17, 2014

added Clone trait for event::Key
Xirdus
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