http: upgrade HttpRequest model to new Uri
http: small cleanup in error model
http: introduce dedicated model for Uri.Query, now also support multiple values for a key
io: smaller fixes to akka.io TCP implementation
http: add header models for `Server`, `Transfer-Encoding` and `User-Agent` headers
http: add `withEffectiveUri` member to HttpRequest, improve error model
httpx: upgrade to latest spray-http
can: complete new client-side infrastructure, upgrade to latest spray-http, more tests
simple-http-client example: rewrite for new spray-can client-side infrastructure
http & examples: upgrade simple-http-server example to latest spray-http
http: smaller improvements to Uri model
http: revert to cleaner Option-based `ack` model on HttpMessages
can & httpx: change back to Option-based `ack` model
testkit: upgrade to latest spray-http
routing: upgrade to latest spray-http
sbt: upgrade to Scala 2.10.1, Akka 2.1.2 and latest versions of other dependencies
echo-server example: upgrade to latest IO infrastructure
examples: update on-spray-can example
servlet: upgrade to latest spray-http and configuration convention
examples: upgrade simple-spray-servlet-server