= can: prevent NPE when dispatching response to closed connection, fixes #387

Before using the actorContext, it is checked that it has not become null.
= docs: import 1.1-M8 documentation and expect nightly build to deploy the rest of documentation, fixes #422
= docs: add section about how to edit documentation
+ http: New Raw-Request-URI header that can be added by the server if configured to do so.
+ can: Support access to the undecoded request target URL.

Access is a via a new Raw-Request-URI header, and only if the spray.can.server.raw-request-uri-header setting is set to on. It defaults to off.
= build: expect `sphinx-build` at well-known locations
+ can: add `spray.can.client/server.incoming-auto-chunking-threshold-size`, fixes #189

The setting is still disabled per default because it is not yet clear
how the higher-level API are going to deal with it generally.
= can: add streaming file upload code to simple-http-server example

This is the most basic form working with the current version of the
chunking message protocol. Once we have implemented registering for
chunked messages the `chunkHandlers` map can go.
= can: always produce chunks if Content-Length >= autoChunkingThreshold

I.e. also when the complete body is already available. Thanks, Bob Ngu for
the fix.
+ http: support proxy authentication
= sbt: change spray-testkit dependency on akka-testkit from 'provided' to 'compile'
= utils: remove unnecessary synchronisation on SettingsCompanion
Merge pull request #447 from mighdoll/lee/akka-testkit-dependency

fix #446: spray-testkit has a 'runtime' dependency on akka-testkit
= http: refactor auth headers
- move Challenge to AdditionalRules
- move Www-/Proxy-Authenticate to SimpleHeaders
- move Proxy-Authorization to AuthorizationHeader
- delete ProxyAuthenticateHeader, ProxyAuthorizationHeader, WwwAuthenticateHeader
Merge pull request #451 from 2beaucoup/feature/proxy-auth

+ http: support proxy authentication
Merge pull request #425 from jrudolph/wip/chunkless-request-streaming

+ can: add `spray.can.client/server.incoming-auto-chunking-threshold-size`, fixes #189
Merge pull request #423 from jrudolph/wip/nightly-docs

= docs: import 1.1-M8 documentation and expect nightly build to deploy the rest of documentation, fixes #422
Merge pull request #419 from jrudolph/wip/doc-contributing-documentation

= docs: add section about how to edit documentation
Merge pull request #418 from MarkvanderTol/ticket-387

Prevent NPE when dispatching response to closed connection
! can: make Content-Length a long value, fixes #443

API changes:
  * `Content-Length`.length is now a Long
  * `max-content-length` setting is now also a Long
  * `incoming-auto-chunking-threshold-size` is now also a Long

This change makes only sense in combination with (auto-)chunking,
because we are not able to support byte arrays (HttpEntities) bigger
than Int.MaxValue.