bors 25d68366b7 auto merge of #12522 : erickt/rust/hash, r=alexcrichton
This patch series does a couple things:

* replaces manual `Hash` implementations with `#[deriving(Hash)]`
* adds `Hash` back to `std::prelude`
* minor cleanup of whitespace and variable names.
2014-02-25 06:41:36 -08:00
..
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