Port #424 on master
Upgrade Netty 4.0.13
Allow Multipart with unknown content length, close #427
dammit
Update README.md
Fix compilation error.
Fix for #429.
Nitpicking: "it's" -> "its"
Implement onRequestSent for Netty provider, close #434
Fix deprecation
Add new onRetry callback method for #435
When debug is enabled, Netty ConnectListener erroneously consumes a retry token, close #436
Respect Rawl URL Setting for Grizzly Provider

Grizzly Provider currently does not respect the RawURL setting of config. Studying the Netty implementation, I think this is how to fix it (it is done in a similar way). I'm not really sure, though.
Support DEFLATE compression for Netty provider

Since Netty itself supports both gzip and deflate compression, allow both in the request, too. At strucr.com we noticed, there are quite some sites out there that do only support deflate, but no gzip.
Merge pull request #438 from gerdriesselmann/patch-3

Support DEFLATE compression for Netty provider
Minor clean up
Merge pull request #432 from kryger/patch-1

Nitpicking: "it's" -> "its"
Merge pull request #437 from gerdriesselmann/patch-2

Respect Rawl URL Setting for Grizzly Provider
Netty: allow passing a body with all HTTP methods, close #421
Fix test after #438