Bug 878526 - OdinMonkey: handle 'unknown' type properly for FFI functions with unused results (r=bbouvier)

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extra : rebase_source : 13c2a08c6c1e1c8b00272a8aa0c5e7e17031e8ca
Bug 878429 - IonMonkey: don't conflate 0 and -0 in IsConstant (r=jandem)

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extra : rebase_source : d51c8f2984c1346eeb377be9f08546ca3ba57f04
Bug 878433 - OdinMonkey: (signed % signed) should be intish, not int (r=bbouvier)

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extra : rebase_source : c2a1d3a7da1ac3b7dd8507772a8b1cdb33e3415e
Bug 878505 - OdinMonkey: store to float array should accept doublish (r=bbouvier)

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extra : rebase_source : 3f4af584882995a49475903a0c4b87cf2b52d4af