Fix bad field name in request HeaderCollection.

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extra : rebase_source : 6805fa64348bdaa8051c83672f3b30163d5edcb5
Cause travis to make docs.

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extra : rebase_source : de73ed963c74508a08556badb2fa2eb8c82e7335
Change crate_types from lib to rlib + dylib.

--HG--
extra : rebase_source : 06b603a32cc244bfb94e2be5472b0211b49488c2
Str type tweaks for a smidgeon of efficiency.

--HG--
extra : rebase_source : d8453b60c24fed86120feb500817f91bbdce32f0