Ruffruffs

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* URL Request path fix
* Proxy fix.
* Timeouts fix.

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* Keep-alive support!
* Complete removal of Urllib2
* Complete removal of Poster
* Complete removal of CookieJars
* New ConnectionError raising
* Safe_mode for error catching
* prefetch parameter for request methods
* OPTION method
* Async pool size throttling
* File uploads send real names
* Vendored in urllib3

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* Digest authentication bugfix (attach query data to path)

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* Response.content = None if there was an invalid response.
* Redirection auth handling.

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* Session Hooks fix.

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* Digest Auth fix.