Bug 863526 - Attempt to GC before the StoreBuffer overflows; r=billm

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extra : rebase_source : fe3df4a92c84e0b5a15df8bd3d5761b7e063a007
Bug 863523 - Avoid post-barrier on global slots for JIT code; r=billm,terrence

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extra : rebase_source : 07295033b68776856fc3f519d08a6a114c930dd6
Bug 863795 - Add a de-duping step to store buffer compaction; r=billm

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extra : rebase_source : eaad82c46626d0031d87d42a31656645ed1c17f7
Bug 863521 - Remove legacy verifier nursery and store buffer from the Zone; r=billm

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extra : rebase_source : 4418bf1acf0badb99a92a976cee5c36df94c587a
Bug 863853 - Restrict the new object cache to GenericObject; r=billm,terrence

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extra : rebase_source : 56e0efbd232a39ba5d27ed04673c97fd9d06141a