Responder as an enumeratee makes a stateless request.
A little responder sugar.
The challenge
Challenge accepted.
Status line responder sugar.
Merge branch 'topic/responder-as-enumeratee' into grizzly-wrappedchunks
Raw after merge.

Conflicts:
	core/src/main/scala/org/http4s/MockServer.scala
	core/src/main/scala/org/http4s/Responder.scala
	core/src/main/scala/org/http4s/Writable.scala
	core/src/main/scala/org/http4s/package.scala
	core/src/test/scala/org/http4s/ExampleRoute.scala
	core/src/test/scala/org/http4s/MockServerSpec.scala
	core/src/test/scala/org/http4s/attributes/ScopeSpec.scala
Compiles, and MocServer tests run.