Warn about unsafe blocks in unsafe functions#6038

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alexcrichton wants to merge 3 commits intorust-lang:incomingfrom

alexcrichton:more-unsafe

Commits on Apr 23, 2013

Improve the unused unsafe block warning to include unsafe blocks in unsafe functions
alexcrichton
committed
Removing more unnecessary unsafe blocks throughout
alexcrichton
committed
Fixing some various warnings about unused imports
alexcrichton
committed