Add linear type facility#776

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aidancully wants to merge 4 commits into

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aidancully:linear-trait

Commits on Jan 31, 2015

Commits on Feb 1, 2015

fix misunderstanding of `&move` pointers. use new `DropPtr` type
aidancully
committed

Commits on Feb 3, 2015

change `Linear` type-name to `Droppable`, invert meaning.
aidancully
committed