Bug 1044709 - DMD: emit JSON output and use Python for post-processing. r=mccr8.

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extra : rebase_source : ddc94d9be1ee0acc6dda30540defd5f40db0adcb
Bug 1044709 - Improve the comment describing the memory report file format. r=mccr8.

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extra : rebase_source : 41738a5a898c67f6dd4a41cbf0d877d85f3f4feb
Bug 1074008 - Add a --fix-stacks option to dmd.py. r=glandium.

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extra : rebase_source : 6ecfdf21ed09671bf9e1e65072dafc1402052a65