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status mods for sleep and burn that implement dreamer's move choice effect and grit power's ignoring burn's attack drop.

weather is also implemented in the status file, so i went ahead and included modifications to account for field warp, since the duration modification of weather from the rocks is also implemented here. i made them stack, but they could just as easily be made to not stack. whichever decision is made, it will hardly ever be relevant, since all native users of field warp are mega evolutions.
Merge pull request #2 from sxizzor/patch-4

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